Mock Test Attempt

1. Law of refection ?

A. Angle of incidence is grater than angle of reflection

B. Angle of incidence is lesser than angle of reflection

C. Angle of incidence is equal than angle of reflection

D. None

2. Size of Pupils are controlled by

A. Cornea

B. Cilliary muscle

C. Iris

D. Lens

3. Normal adult can read with an eyes is about ?

A. 10 cm

B. 25 cm

C. 50 cm

D. 100 cm

4. In how many days moon takes to orbit the Earth ?

A. 25.3 days

B. 26.3 days

C. 27.3 days

D. 28.3 days

5. Which of following statement is correct ?

A. Moon has atmosphere

B. Moon has No atmosphere

C. Both

D.

6. Electrical Fuse is kept in ___________ circuit to protect from damage caused by high voltage ?

A. Series

B. Parallel

C. Both

D. None

7. Electrical Fuse wire is made up of alloy ?

A. Lead

B. Tin

C. Copper

D. All the above

Electrical fuse wire is typically made from an alloy of lead and tin. as copper can also be part of some fuse designs, but lead and tin are the primary components.

8. Decorating and street lights are arranged in ____________ in an electrical circuit ?

A. Series

B. Parallel

C. Both

D. None

In parallel connections, each light receives the full voltage, ensuring they operate at their rated brightness. If connected in series, the voltage drop across each light would cause them to glow dimly, affecting performance. This is why street lights and household lighting are connected in parallel. Great explanation!

9. Which of the following instruments works with principle of sea back effect ?

A. Thermopile

B. Thermomter

C. Ammeter

D. A and B

key points about the instruments that work on the principle of the Seebeck effect: <ol> <li> Seebeck Effect: It generates voltage when there is a temperature difference between two different conductors. </li> <li> Thermopile: This device consists of multiple thermocouples connected in series or parallel to measure temperature differences and convert thermal energy to electrical energy. </li> <li> Thermocouples: A type of thermometer that uses the Seebeck effect to measure temperature by generating a voltage based on the temperature difference between junctions. </li> <li> Applications: Both thermopiles and thermocouples are used in temperature measurement, energy harvesting, and industrial applications. </li> </ol>

10. Applications of Joule or Thomson effects ?

A. Electrical Heat

B. Electrical furnace

C. Ice plants

D. All the above

The applications of Joule or Thomson effects include: a) Electrical heat: used in heating devices. b) Electrical furnaces: for industrial heating. c) Ice plants: applied in cooling processes. Thus, the answer is d) All the above.

11. Sexual reproduction of plants, Plants reproduces new plants ?

A. Without Seeds

B. With Seeds

C. Both

D. None

The sexual reproduction of plants involves the formation of new plants with seeds, as it requires the fusion of male and female gametes, leading to seed formation. Thus, the correct answer is b) With Seeds.

12. Vegetative parts of plants are ?

A. Roots

B. Stems

C. Leaves

D. All the above

The vegetative parts of plants include roots, stems, and leaves. Therefore, the correct answer is: d) All the above.

13. Water Day is observed on ?

A. 21 March

B. 22 March

C. 23 March

D. 24 March

World Water Day is observed on 22 March annually to raise awareness about the importance of freshwater and the sustainable management of water resources. It promotes global water conservation efforts.

14. United Nations declared 2019 as ?

A. International Year of Indigenous Languages

B. International Year of Yoga

C. International Year of Water

D. International Year of Family Farming

The United Nations declared 2019 as the International Year of Indigenous Languages to raise awareness about the critical loss of indigenous languages and promote their preservation, revitalization, and support for cultural diversity.

15. Angle between normal and reflected ray is called as ?

A. Angle of reflection

B. Angle of refraction

C. Angle of incidence

D. None

The angle between the normal and the reflected ray is known as the angle of reflection. According to the law of reflection, this angle is equal to the angle of incidence at the surface.

16. Splitting of light into its colour is called as ?

A. Inversion

B. Dispersion

C. Reflection

D. None

The splitting of light into its component colors is called dispersion. This phenomenon occurs when light passes through a prism, separating it into colors like red, orange, yellow, green, blue, and violet.

17. In Optic nerve, cones and rods are ?

A. Cones- Sensitive to bright light and Rods- Sensitive to dim light

B. Cones- Sensitive to dim light and Rods- Sensitive to dim light

C. Cones- Sensitive to bright light and Rods- Sensitive to bright light

D. None

In the optic nerve, cones are sensitive to bright light and responsible for color vision, while rods are sensitive to dim light, aiding in night vision and detecting motion.

18. New moon day ?

A. Moon is between the earth and the sun

B. Moon is opposite the earth and the sun

C. Moon is middle in the earth and the sun

D. None

On New Moon Day, the moon is positioned between the Earth and the Sun, resulting in the moon's illuminated side facing away from Earth, making it virtually invisible in the night sky.

19. Moon revolves around the Earth takes 27.3 days and Moon rotates his its orbit also takes 27 days. Is this valid statement ?

A. Yes

B. No

C.

D.

The statement is mostly accurate but slightly misleading. <ul> <li>Revolves: The Moon takes approximately 27.3 days (specifically 27.322 days) to complete one orbit around the Earth.</li> <li>Rotates: The Moon also takes about 27.3 days to rotate on its axis, which means its rotation period is synchronized with its orbital period.</li> </ul> So, both revolution and rotation periods are essentially the same, resulting in the same side of the Moon always facing Earth.

20. In houses, which type of connections are used ?

A. One Room to another Series and Within room parallel connection

B. One Room to another Parallel and Within room series connection

C. One Room to another Series and Within room also series connection

D. One Room to another Parallel and Within room also parallel connection

In houses, electrical connections typically use a series connection between rooms to manage power supply and a parallel connection within rooms, allowing multiple appliances to function independently without affecting each other.

21. Which of the following metals are used for construction of Thermo couple ?

A. Iron and Copper

B. Antimony and Bismuth

C. Antimony and Copper

D. None

The correct metals commonly used for the construction of thermocouples are typically combinations of different materials, such as: <ul> <li>Iron and Copper</li> <li>Antimony and Bismuth can also be used in specific types of thermocouples, known as "type T" or others for low-temperature measurements.</li> </ul> Antimony and Bismuth can indeed be valid for certain thermocouples.

22. Mica sheet in iron box ?

A. Good conductor of Electricity and also heat

B. Good conductor of Electricity and bad conductor of heat

C. Good insulator of Electricity and good conductor of heat

D. None

Mica sheets are good insulators of electricity but not good conductors of heat. They provide electrical insulation while withstanding high temperatures, making them suitable for various applications.

23. Which of the following can be used to detect IR Rays ?

A. Thermopile

B. Thermometer

C. Both

D. None

A thermopile can detect infrared (IR) rays, while a thermometer typically measures temperature but is not specifically designed for detecting IR radiation.

24. Parallel connection ?

A. Second end of 1st conductor is connected to First end of next conduction

B. First end of all conductor connected to one common point and another end connected to another point

C. Both

D. None

In a parallel connection, the first ends of all conductors are connected to a common point, while the other ends are connected to another point, allowing multiple paths for current.

25. Parallel connection/combination, Resistance ?

A. Increases, Current decreases

B. Decrease, Current Increase

C. Increase, Current Increase

D. None

In a parallel connection, the total resistance decreases, which allows the total current flowing through the circuit to increase

26. A body revolving around another body is called as ?

A. Meteors

B. Asteroids

C. Satellite

D. Constellations

A body that revolves around another body is referred to as a satellite. Satellites can be natural, like moons orbiting planets, or artificial, like those launched by humans for communication, weather monitoring, or research. Their orbits allow them to gather data and enhance our understanding of space and Earth.

27. Our Solar System consists of ?

A. 8 Planets, Asteroids, comets and meteors

B. 8 Planets

C. 9 Planets, Asteroids, comets and meteors

D. 9 Planets

Our Solar System consists of eight recognized planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. In addition to these planets, it includes numerous asteroids, comets, and meteors. This diverse array of celestial bodies orbits the Sun, creating a dynamic and complex cosmic environment.

28. In general Stars appears to move from ?

A. West to East

B. East to West

C. North to South

D. South to North

Stars appear to move from east to west across the night sky due to the Earth’s rotation. As the Earth spins on its axis from west to east, this motion creates the illusion of celestial bodies traveling in the opposite direction. This phenomenon is observed nightly in various locations.

29. First Indian Satellite ?

A. Apollo

B. Aryabhata

C. INSAT

D. IRS

The first Indian satellite, Aryabhata, was launched on April 19, 1975. It marked a significant milestone in India's space program, providing valuable data for scientific research. Designed for experiments in various fields, Aryabhata laid the foundation for future advancements in satellite technology and space exploration in India.

30. Halley’s comet appears after nearly every ?

A. 26 yrs

B. 56 yrs

C. 76 yrs

D. 96 yrs

Halley's Comet is a famous short-period comet that becomes visible from Earth approximately every 76 years. Its last appearance was in 1986, and it is expected to return in 2061. Named after astronomer Edmond Halley, who predicted its periodicity, it has been observed for over two millennia.

31. Axis of the Earth is inclined to its orbital plane at angle of ?

A. 22.5⁰

B. 67.5⁰

C. 23.5⁰

D. 66.5⁰

The Earth's axis is tilted at 66.5° from the plane of its orbit (the ecliptic). This tilt is also expressed as 23.5° from the vertical. This axial tilt is responsible for the changing seasons as Earth orbits the Sun, causing varying angles of sunlight on different parts of the planet.

32. Tail of comet always directed ?

A. Towards the Sun

B. Away from Sun

C. Both

D. None

The tail of a comet is always directed away from the Sun due to the force exerted by the solar wind and radiation pressure. This phenomenon occurs regardless of the comet's movement, meaning the tail points away as it approaches or moves away from the Sun, creating a distinct visual effect.

33. Which of the following are called as outer planets ?

A. Mercury, Venus, Earth, Mars

B. Mercury, Venus, Earth, Mars and Jupiter

C. Jupiter, Saturn, Uranus, Neptune d) Saturn, Uranus, Neptune and Pluto

D. Saturn, Uranus, Neptune and Pluto

The outer planets, also known as gas giants and ice giants, include Jupiter, Saturn, Uranus, and Neptune. They are located beyond the asteroid belt and are much larger than the inner planets, consisting primarily of hydrogen, helium, and other gases. These planets have rings and many moons orbiting them.

34. Which of the following are called as inner planets ?

A. Mercury, Venus, Earth, Mars

B. Mercury, Venus, Earth, Mars and Jupiter c) Jupiter, Saturn, Uranus, Neptune d) Saturn, Uranus, Neptune and Pluto

C. Jupiter, Saturn, Uranus, Neptune

D. Saturn, Uranus, Neptune and Pluto

The inner planets, or terrestrial planets, include Mercury, Venus, Earth, and Mars. These planets are characterized by their rocky surfaces and smaller sizes compared to the outer planets. They are located closer to the Sun and have solid ground, unlike the gas giants found in the outer solar system.

35. Plant Uranus Rotates form ?

A. West to East

B. East to West

C. North to South

D. South to North

Uranus uniquely rotates east to west, contrary to the majority of planets, which rotate from west to east. This retrograde rotation contributes to its unusual axial tilt, causing extreme seasonal variations. Uranus’s distinctive rotation and tilt set it apart in the solar system, influencing its atmospheric dynamics and weather patterns.

36. Saturn is said have least dense among all planets, it density is less than ?

A. Mercury

B. Hydrogen

C. Water

D. Oxygen

Saturn is the least dense planet in the solar system, with a density lower than that of water. This unique characteristic means that if placed in a sufficiently large body of water, Saturn would float. Its low density is primarily due to its gaseous composition, primarily hydrogen and helium. Saturn's density is lower than that of water, which has a density of 997 kg/m³. As the least dense planet in the solar system, Saturn's gaseous composition allows it to float in water if placed in a large enough body. This fascinating feature highlights its unique characteristics among the planets.

37. Saturn is appear in ?

A. Reddish colour

B. Yellowish colour

C. Blue Colour

D. None

Saturn appears in a yellowish color due to its thick atmosphere, which contains ammonia clouds and other gases that scatter sunlight.

38. Jupiter is largest planet of solar system, Its mass is about ?

A. 18 times of Earth

B. 118 times of Earth

C. 218 times of Earth

D. 318 times of Earth

Jupiter, the largest planet in the solar system, has a mass approximately 318 times that of Earth. This immense mass contributes to its strong gravitational pull, enabling it to maintain numerous moons and a vast atmosphere primarily composed of hydrogen and helium. Its size and mass make it a dominant

39. Mars is called as Red Planet, It has ?

A. 2 satellites

B. 5 satellites

C. 1 satellites

D. No satellites

Mars, known as the Red Planet, has two satellites: Phobos and Deimos. These small, irregularly shaped moons are thought to be captured asteroids. Phobos is larger and orbits closer to Mars, while Deimos is smaller and farther away, both contributing to Mars' intriguing characteristics in the solar system.

40. From space, Earth looks like

A. Black Colour

B. Blue – Green Colour

C. Blue Colour

D. None

From space, Earth appears predominantly blue-green due to its vast oceans, which cover about 71% of the surface, and the presence of landmasses and atmospheric conditions. The blue hue is primarily from water, while green tones are reflected from forests and vegetation, creating a vibrant view of our planet.

41. Earth rotates from West to East and Venus Rotates ?

A. West to East

B. East to West

C. North to South

D. South to North

Venus rotates east to west, a retrograde rotation unlike most planets, including Earth, which rotates from west to east. This unique movement results in Venus having a day longer than its year. The slow, retrograde rotation significantly influences its atmospheric conditions and surface temperatures, creating a distinctive planetary environment.

42. Venus has ____ satellites ?

A. 2 satellites

B. 5 satellites

C. 1 satellites

D. No satellites

Venus has no natural satellites. Unlike Earth and Mars, which have moons, Venus orbits the Sun as a solitary planet, making it unique in our solar system.

43. enus is called as ?

A. Morning star

B. Evening Star

C. Both

D. A or B

Venus is often referred to as the Morning Star or the Evening Star, depending on its visibility in the sky at dawn or dusk, showcasing its bright appearance.

44. Venus is nearest planet to Earth and also it is ?

A. Brightest Planet

B. Smallest Planet

C. Biggest Planet

D. None

Venus, the nearest planet to Earth, is also known as the brightest planet in the night sky. Its reflective clouds of sulfuric acid and its proximity to Earth contribute to its brilliance. Often visible at dawn or dusk, Venus plays a significant role in both astronomy and cultural symbolism.

45. Mercury has ____ satellites ?

A. 2 satellites

B. 5 satellites

C. 1 satellites

D. No satellites

Mercury has no natural satellites. Unlike many other planets in the solar system, it orbits the Sun alone, making it unique in its lack of moons or rings.

46. Mercury is nearest planet to Sun and also it is ?

A. Brightest Planet

B. Smallest Planet

C. Biggest Planet

D. None

Mercury is the nearest planet to the Sun and is also the smallest planet in the solar system. Its size and proximity contribute to its extreme temperature variations.

47. Nearest star to the Earth ?

A. Sun

B. Alpha Star

C. Pole Star

D. None

The nearest star to Earth is the Sun, located about 93 million miles (150 million kilometers) away. It provides the light and warmth necessary for life on our planet. The Sun is a medium-sized star, classified as a G-type main-sequence star, and plays a crucial role in our solar system.

48. The Constellation which can seen during winter time in northern sky ?

A. Great Bear

B. Orion

C. Leo Major

D. Cassiopeia

Orion is one of the most recognizable constellations in the night sky and is easily identified by its three-star belt. It features several bright stars, including Betelgeuse and Rigel, and is rich in mythology across various cultures. Its prominence during winter makes it a favorite for stargazers in the northern hemisphere.

49. Brightest star in the sky is ?

A. Pole star

B. Sirius

C. Blinking star

D. None

The brightest star in the night sky is Sirius, also known as the Dog Star. Located in the constellation Canis Major, it is significantly brighter than other stars due to its proximity.

50. The Constellation which can seen during winter time in late evenings ?

A. Great Bear

B. Orion

C. Leo Major

D. Cassiopeia

The constellation Orion is prominently visible during winter evenings. Known for its distinctive belt of three stars, Orion features bright stars like Betelgeuse and Rigel, making it easily recognizable.

51. The Constellation which can seen during summer time in early night is ?

A. Great Bear

B. Orion

C. Leo Major

D. Cassiopeia

The Great Bear, also known as Ursa Major, Big Dipper, or Sapatarshi, is prominent in the summer sky, especially in the northern hemisphere. It features the famous asterism known as the Big Dipper, which is easily recognizable.

52. Distance between Sun and Earth is ?

A. 10 light mins

B. 20 light mins

C. 30 light mins

D. 8 light mins

The distance between the Sun and Earth is about 8 light minutes, which translates to approximately 93 million miles (150 million kilometers). This distance varies slightly due to Earth's elliptical orbit. Light from the Sun takes about 8 minutes and 20 seconds to reach our planet, enabling life on Earth.

53. Largest distances are expressed in units called ?

A. Light year

B. Kms

C. Million Kms

D. None

A light year is the distance that light travels in one year, which is approximately 5.88 trillion miles (9.46 trillion kilometers). This unit is commonly used in astronomy to measure vast distances between stars and galaxies, providing a more manageable way to express these immense scales.

54. Sun is approximately how many kilometers away from the Earth ?

A. 60,000 Kms

B. 1 lakh kms

C. 150 million kms

D. None

The Sun is about 150 million kilometers (93 million miles) away from Earth, a distance known as an astronomical unit (AU). This measurement is crucial in astronomy for describing distances within our solar system. The Earth's orbit around the Sun is elliptical, causing slight variations in this distance throughout the year.

55. On 21st July 1969, Neil Armstrong landed on the moon for the first time. He followed by ?

A. Edwin Aldrin

B. Edwin jerff

C. Edwin Willam

D. None

On July 21, 1969, during NASA's Apollo 11 mission, Neil Armstrong became the first person to land on the Moon, followed by Edwin Aldrin. Together, they explored the lunar surface, conducted experiments, and collected samples. This historic event marked a significant achievement in space exploration and human ingenuity.

56. The waves which doesn’t require any material medium for propagation called

A. Sound waves

B. X rays

C. Electromagnetic waves

D. Electrc waves

Electromagnetic waves are a type of wave that can travel through a vacuum, unlike sound waves, which require a medium like air or water. They include a wide range of frequencies, such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays, all moving at the speed of light.

57. Scientific name of moon and study of moon is

A. Moon, Moonology

B. Selene, Selenology

C. Planetary, Astrology

D. Astrology

The scientific name for the Moon is Selene, derived from the Greek goddess of the Moon. The study of the Moon is known as Selenology, which encompasses various aspects, including its geology, surface features, and atmospheric conditions. Selenology helps scientists understand the Moon's formation and its relationship with Earth.

58. To get echo, minimum condition is

A. Both

B. Separation distance 16.5 mts

C. Time Interval between two sounds atleast 1/10th second

D.

To get an echo, both conditions are essential: the time interval between two sounds must be at least 1/10th of a second, and the separation distance should be at least 16.5 meters. This ensures that the reflected sound is heard distinctly after the original sound.

59. Speed of sound in free space is

A. 343 meters per second

B. 0

C. 300 meters per second

D.

Sound cannot travel in free space or a vacuum because it requires a material medium for propagation. In air, the speed of sound is approximately 343 meters per second at room temperature. This dependence on a medium distinguishes sound from electromagnetic waves, which can travel through a vacuum.

60. Inaudible wave beyond 20Hz are

A. Infrasonic and Ultrasonic

B. Infrasonic

C. Ultrasonic

D.

Inaudible waves include infrasonic waves, which are sound waves below 20 Hz, and ultrasonic waves, which are above 20 kHz. Infrasonic waves are often associated with natural phenomena like earthquakes, while ultrasonic waves are used in various applications, including medical imaging and industrial cleaning, due to their high frequency.

61. Smallest unit to measure wavelength is

A. Angstrom

B. nm

C. mm

D.

The angstrom is a unit of length commonly used to measure wavelengths of light, especially in the field of spectroscopy. One angstrom equals 10−1010^{-10}10−10 meters. This small scale is ideal for quantifying atomic and molecular sizes, making it crucial in fields like chemistry and physics.

62. Propagation of sound waves is proposed by

A. Joule

B. Robert Boyle

C. Newton

D.

Robert Boyle demonstrated that sound waves require a medium for propagation by conducting experiments with a vacuum pump in the 1600s. He showed that a ticking clock in a sealed jar became silent when air was removed. Boyle is also known for Boyle's Law, which describes gas pressure and volume relationships.

63. Distance between any two successive compression or rarefaction are called

A. Wave length

B. Wave aptitude

C. Time period

D. a) Wave length b) Wave aptitude c) Time period

The distance between any two successive compressions or rarefactions in a sound wave is called wavelength. It is a key characteristic that determines the wave's properties, such as frequency.

64. In the Phenomenon of resonance, the natural frequency of two bodies should be

A. Low

B. Equal

C. High

D.

<ul> <li>In resonance, two bodies vibrate at the same natural frequency, leading to an increase in amplitude. This occurs in various systems, such as musical instruments and bridges, enhancing sound or structural response.</li> </ul>

65. The point where the density of the vibrating air molecules is maximum and its rarefaction is minimum

A. Amplitude

B. Rarefaction

C. Compression

D.

The point where the density of the vibrating air molecules is maximum and its rarefaction is minimum is called Compression.

66. Ultra Sonic waves can be generated in

A. Atom Bombarding

B. Atom Fusion

C. Piezueo electric effect

D.

Ultrasonic waves are generated using the piezoelectric effect, where materials produce electric charges in response to mechanical stress. This principle is utilized in ultrasound imaging and various industrial applications.

67. Stationary waves carries energy from one point to another

A. YES

B. NO

C.

D.

Stationary waves do not carry energy from one point to another; they are characterized by fixed nodes and antinodes, resulting in energy being stored rather than transmitted.

68. Humans can hear sound in range of

A. 10 Hz to 20,000 Hz

B. 20 Hz to 20,000 Hz

C. 20 Hz to 40,000 Hz

D.

Humans typically hear sounds in the frequency range of 20 Hz to 20,000 Hz (20 kHz). Sounds below 20 Hz are classified as infrasonic, while those above 20 kHz are ultrasonic. This range allows us to perceive various sounds, including speech, music, and environmental noises, essential for communication and interaction.

69. Transverse waves, pick odd

A. Solid

B. Liquids

C. Air

D.

Transverse waves can travel through solids, but they cannot propagate through fluids like liquids or gases (such as air).

70. Sound through the solid is

A. Transverse waves

B. Longitudinal waves

C. Both

D.

Sound travels through solids primarily as longitudinal waves, where particles oscillate parallel to the direction of wave propagation. However, it can also propagate as transverse waves in some solids, especially in shear waves. This dual behavior allows sound to travel efficiently in various materials, enabling applications in fields like engineering and seismology.

71. Ultra sound wave used to scan the internal organs of the body is

A. Ultra X ray

B. Ultra scanning

C. Ultra Sonography

D.

Ultrasonography uses high-frequency ultrasound waves to create images of internal organs. It is a non-invasive diagnostic tool widely used in medicine for examining conditions in areas like obstetrics and cardiology.

72. Maximum displacement of vibrating particle from its mean point known as

A. Amplitude

B. Acceleration

C. Magnitude

D.

Amplitude refers to the maximum displacement of a vibrating particle from its equilibrium position. It is a key parameter in wave phenomena, influencing the wave's energy and intensity.

73. If the amplitude of waves decreases with respect to time, then such waves are

A. Sound waves

B. Slow amplitude waves

C. Damping waves

D.

Damping waves refer to waves whose amplitude decreases over time due to energy loss, often caused by friction or resistance. This phenomenon is common in sound waves and mechanical vibrations.

74. Units of frequency

A. second/cycle

B. cycle/second

C. cycle/min

D.

Frequency measures how often a cycle occurs in a given time. It is expressed as cycles per second (Hertz, Hz). Higher frequencies indicate more cycles occurring in that timeframe.

75. Light waves propagates in the form

A. Transverse waves

B. Longitudinal waves

C. Both

D.

Light waves are electromagnetic waves that propagate as transverse waves, with electric and magnetic fields oscillating perpendicular to the direction of wave travel, allowing them to move through a vacuum.

76. Quantum theory of radiation was proposed by

A. Max planck

B. Newton

C. Bell

D.

Max Planck proposed the quantum theory of radiation in 1900, introducing the idea that energy is quantized and emitted in discrete units called "quanta," revolutionizing our understanding of thermodynamics and light.

77. Lights wave are

A. Mechanical waves

B. Electromagnetic waves

C. Transverse waves

D.

Light waves are classified as electromagnetic waves. Unlike mechanical waves, which require a medium to travel through, electromagnetic waves can propagate through a vacuum. Additionally, light waves are considered transverse waves, meaning the oscillations occur perpendicular to the direction of wave propagation. So, in summary, light waves are electromagnetic and transverse waves.

78. According to Huygens’s wave theory, light propagates in the form of

A. Electromagnetic waves

B. Mechanical waves

C. Transverse waves

D.

<div class="flex max-w-full flex-col flex-grow"> <div class="min-h-8 text-message flex w-full flex-col items-end gap-2 whitespace-normal break-words [.text-message+&]:mt-5" dir="auto" data-message-author-role="assistant" data-message-id="eae14d68-6706-4fa7-bc96-beee006c716f"> <div class="flex w-full flex-col gap-1 empty:hidden first:pt-[3px]"> <div class="markdown prose w-full break-words dark:prose-invert light"> Detailed overview of electromagnetic waves, mechanical waves, and transverse waves: <h3>Electromagnetic Waves</h3> <ul> <li>Nature: These waves consist of oscillating electric and magnetic fields that propagate through space.</li> <li>Medium: They do not require a medium; they can travel through a vacuum (e.g., light from the Sun reaching Earth).</li> <li>Examples: Visible light, radio waves, microwaves, infrared radiation, ultraviolet light, X-rays, and gamma rays.</li> <li>Speed: In a vacuum, electromagnetic waves travel at the speed of light (approximately 3×1083 \times 10^83×108 m/s).</li> <li>Characteristics: <ul> <li>Can exhibit both wave-like and particle-like properties (wave-particle duality).</li> <li>Can vary in wavelength and frequency, which determines their energy and type.</li> </ul> </li> </ul> <h3>Mechanical Waves</h3> <ul> <li>Nature: These waves propagate through a medium due to the vibration of particles within that medium.</li> <li>Medium: Require a medium (solid, liquid, or gas) to travel. For example, sound waves travel through air or water.</li> <li>Examples: Sound waves, water waves, and seismic waves.</li> <li>Speed: The speed of mechanical waves depends on the medium (e.g., sound travels faster in water than in air).</li> <li>Characteristics: <ul> <li>Energy is transferred through the medium by particle interactions.</li> <li>Can be classified into two types: transverse waves and longitudinal waves.</li> </ul> </li> </ul> <h3>Transverse Waves</h3> <ul> <li>Nature: In transverse waves, the oscillations are perpendicular to the direction of wave propagation.</li> <li>Examples: Light waves (electromagnetic), waves on a string, and certain seismic waves (S-waves).</li> <li>Characteristics: <ul> <li>Can travel through solids and along the surface of liquids, but not through fluids in general.</li> <li>Have crests (highest points) and troughs (lowest points).</li> </ul> </li> </ul> <h3>Summary</h3> <ul> <li>Electromagnetic waves are non-mechanical, can travel through a vacuum, and include light.</li> <li>Mechanical waves require a medium and can be either transverse or longitudinal.</li> <li>Transverse waves feature oscillations perpendicular to wave direction, exemplified by light and some types of sound waves.</li> </ul> </div> </div> </div> </div> <div class="mb-2 flex gap-3 empty:hidden -ml-2"> <div class="items-center justify-start rounded-xl p-1 flex"> </div> </div>

79. According to Newton Corpuscular theory, light particles move with high speed through

A. denser medium and less speed in rare medium

B. rare medium and less speed in denser medium

C. both medium

D.

According to Newton's corpuscular theory, light particles (or "corpuscles") move with high speed in a rarer medium and less speed in a denser medium. This concept suggested that light travels faster in less dense materials (like air) and slows down in denser materials (like water or glass). This is in contrast to the behavior described by wave theory, which explains refraction and other phenomena in terms of wave properties.

80. Study of vision

A. Speconlogy

B. Opthnology

C. ophthalmology

D.

Ophthalmology is the medical specialty focused on the study, diagnosis, and treatment of eye disorders. It encompasses conditions affecting vision, including cataracts, glaucoma, and retinal diseases. Ophthalmologists perform surgeries, prescribe medications, and provide eye care. This field plays a vital role in maintaining visual health and preventing blindness. The other two terms, "Speconlogy" and "Opthnology," do not appear to be recognized fields in medical science.

81. Accurate duration of the day is

A. 24 hrs 56 mins 4 secs

B. 23 hrs 56 mins 4 secs

C. 22 hrs 56 mins 4 secs

D.

The accurate duration of a day, known as a sidereal day, is 23 hours, 56 minutes, and 4 seconds. This measures the time it takes for the Earth to complete one full rotation relative to distant stars, rather than the Sun.

82. If the atmosphere of the earth disappears suddenly then duration of the day decreases by

A. 5 mins

B. 3 mins

C. 4 mins

D.

If the Earth's atmosphere were to suddenly disappear, the duration of the day would decrease by about 4 minutes. This is because atmospheric drag slightly slows down the Earth's rotation, so without the atmosphere, the Earth would spin slightly faster.

83. Twinking of the stars due to the property of __________ in the atmosphere of earth

A. Both

B. Refraction of light

C. Reflection of light

D.

The twinkling of stars is due to the refraction of light in the Earth's atmosphere. As starlight passes through different layers of the atmosphere, which have varying densities, the light bends, causing the stars to appear to twinkle. Reflection does not play a role in this phenomenon.

84. Without atmosphere, sky looks

A. White

B. orange

C. Black

D. Purple

Without the atmosphere, the sky would look black. The Earth's atmosphere scatters sunlight, making the sky appear blue during the day. Without this scattering effect, as seen from space or the Moon, the sky would appear black even in daylight.

85. Study of the hands

A. chiology

B. Chirology

C. Chiropody

D.

The study of the hands is called Chirology. It involves the examination of the structure, movements, and characteristics of the hands. Chiropody, on the other hand, refers to the medical care of feet, commonly known as podiatry.

86. Surface of soap bubbles appears different color due to

A. Reflection of light

B. Interference of light

C. Refraction of light

D.

The surface of soap bubbles appears in different colors due to the interference of light. When light reflects off the thin layers of the bubble, the waves of light overlap and interfere with each other, either amplifying or canceling out certain colors, creating the vibrant patterns we see.

87. Working of endoscopic and laparoscopic is based on

A. Refraction of light

B. Reflection of light

C. Total internal reflection of light

D.

The working of endoscopy and laparoscopy is based on total internal reflection of light. Fiber optic cables used in these procedures transmit light through total internal reflection, allowing doctors to visualize internal organs and tissues by guiding light through flexible tubes.

88. Study and measurement of light

A. Photometry

B. Lightology

C. photonic

D.

The study and measurement of light is called Photometry. It involves measuring the intensity, brightness, and distribution of light. Photonic relates to the science of photons and light particles, but it does not specifically focus on the measurement of light. "Lightology" is not a recognized term in this field.

89. Science day is on

A. Feb 26

B. Feb 28

C. Feb 27

D.

Science Day is celebrated on February 28 in India. This day commemorates the birth anniversary of Sir C.V. Raman, who won the Nobel Prize in Physics in 1930 for his work on the scattering of light, known as the Raman Effect.

90. On which of the following the duration of the day is accurate

A. Earth

B. Mars

C. Moon

D.

<p style="border: 0px; outline: 0px; vertical-align: baseline; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; margin: 0px 0px 10px; padding: 0px;">Planet Day Length Mercury: 1,408 hours Venus: 5,832 hours Earth: 24 hours Mars: 25 hours (24 hours and 39 minutes) Jupiter: 10 hours Saturn11 hours Uranus17 hours Neptune16 hours

91. Bending of Light ray, when it propagates from one medium to another medium is called

A. Di fraction of light

B. Reflection of light

C. Refraction of light

D.

The bending of a light ray when it propagates from one medium to another is called refraction of light. This phenomenon occurs due to the change in the speed of light as it passes through different materials.

92. Science of humidity

A. Hygrometry

B. Hyposcopy

C. Hymnology

D.

The science of humidity is called Hygrometry. It involves the measurement and study of humidity in the air, including the instruments used to measure it, known as hygrometers. Hyposcopy refers to a method of examining the eye, and Hymnology is the study of hymns and religious songs.

93. Black is

A. Good Absorber

B. Both

C. Good Emitter

D.

Black is considered a good absorber and a good emitter of thermal radiation. It absorbs nearly all wavelengths of light, making it effective at taking in heat, and it also emits thermal radiation effectively.

94. Wave length of every color can be determined by the

A. spectrometer

B. Speedometer

C. Lightometer

D.

The wavelength of every color can be determined by the spectrometer. A spectrometer analyzes the light spectrum and measures the wavelengths of different colors. Speedometer measures speed, and lightometer is not a standard scientific term.

95. Primary color are Red, Blue, Green and secondary are

A. Peacock blue

B. Yellow

C. Magento

D. Both B & C

The secondary colors derived from the primary colors (Red, Blue, Green) are Yellow, Cyan (not listed), and Magenta. Therefore, the correct answer among the options provided is Magenta and Yellow.

96. The minimum distance to see the object clearly is Least distance distinct vision( LDDV)

A. 25 cms

B. 15 cms

C. 20 cms

D.

The minimum distance to see an object clearly, known as the Least Distance of Distinct Vision (LDDV), is typically 25 cm for a normal human eye.

97. To kill bacteria in milk and water, which of the following rays are used

A. UV rays

B. Infrared rays

C. Gamma rays

D.

To kill bacteria in milk and water, UV rays (ultraviolet rays) are commonly used. UV sterilization is effective in disinfecting these liquids by damaging the DNA of bacteria and other pathogens.

98. Mirrors used in vehicle( driver mirror)

A. Concave mirror

B. None of the above

C. Convex mirror

D.

A convex mirror is used as a rear-view mirror in vehicles because it consistently forms virtual, erect, and diminished images regardless of the distance of the object. This characteristic allows drivers to see a larger area of traffic behind them, making it safer to change lanes and maneuver. Convex mirrors help minimize blind spots, providing a wider field of vision compared to flat or concave mirrors.

99. _________ is clotted on backside of mirror

A. Silver anomide

B. Silver bromide

C. Silver trimide

D.

Silver bromide is clotted on the backside of a mirror during the process of making a reflective surface. It is used in the silvering process to create the reflective layer that allows mirrors to reflect light effectively.

100. Mirrors are based on the property of

A. Reflection of light

B. Refraction of light

C. Both

D.

Mirrors are based on the property of reflection of light. They work by reflecting light off their smooth surfaces to form images. Refraction of light is not a property utilized in mirrors.

101. ____________ energy laser rays are used to take 3D photograph

A. High

B. Low

C. Medium

D.

Infrared laser beams are used in lidar (Light Detection and Ranging) technology. A low-power infrared laser sweeps over an object, and a detector measures the time it takes for photons to return. This time delay is used to calculate the distance to the object, enabling detailed 3D mapping.

Physics Chemistry & Biology Test 1

1. Law of refection ?

2. Size of Pupils are controlled by

3. Normal adult can read with an eyes is about ?

4. In how many days moon takes to orbit the Earth ?

5. Which of following statement is correct ?

6. Electrical Fuse is kept in ___________ circuit to protect from damage caused by high voltage ?

7. Electrical Fuse wire is made up of alloy ?

8. Decorating and street lights are arranged in ____________ in an electrical circuit ?

9. Which of the following instruments works with principle of sea back effect ?

10. Applications of Joule or Thomson effects ?

11. Sexual reproduction of plants, Plants reproduces new plants ?

12. Vegetative parts of plants are ?

13. Water Day is observed on ?

14. United Nations declared 2019 as ?

15. Angle between normal and reflected ray is called as ?

16. Splitting of light into its colour is called as ?

17. In Optic nerve, cones and rods are ?

18. New moon day ?

19. Moon revolves around the Earth takes 27.3 days and Moon rotates his its orbit also takes 27 days. Is this valid statement ?

20. In houses, which type of connections are used ?

21. Which of the following metals are used for construction of Thermo couple ?

22. Mica sheet in iron box ?

23. Which of the following can be used to detect IR Rays ?

24. Parallel connection ?

25. Parallel connection/combination, Resistance ?

26. A body revolving around another body is called as ?

27. Our Solar System consists of ?

28. In general Stars appears to move from ?

29. First Indian Satellite ?

30. Halley’s comet appears after nearly every ?

31. Axis of the Earth is inclined to its orbital plane at angle of ?

32. Tail of comet always directed ?

33. Which of the following are called as outer planets ?

34. Which of the following are called as inner planets ?

35. Plant Uranus Rotates form ?

36. Saturn is said have least dense among all planets, it density is less than ?

37. Saturn is appear in ?

38. Jupiter is largest planet of solar system, Its mass is about ?

39. Mars is called as Red Planet, It has ?

40. From space, Earth looks like

41. Earth rotates from West to East and Venus Rotates ?

42. Venus has ____ satellites ?

43. enus is called as ?

44. Venus is nearest planet to Earth and also it is ?

45. Mercury has ____ satellites ?

46. Mercury is nearest planet to Sun and also it is ?

47. Nearest star to the Earth ?

48. The Constellation which can seen during winter time in northern sky ?

49. Brightest star in the sky is ?

50. The Constellation which can seen during winter time in late evenings ?

51. The Constellation which can seen during summer time in early night is ?

52. Distance between Sun and Earth is ?

53. Largest distances are expressed in units called ?

54. Sun is approximately how many kilometers away from the Earth ?

55. On 21st July 1969, Neil Armstrong landed on the moon for the first time. He followed by ?

56. The waves which doesn’t require any material medium for propagation called

57. Scientific name of moon and study of moon is

58. To get echo, minimum condition is

59. Speed of sound in free space is

60. Inaudible wave beyond 20Hz are

61. Smallest unit to measure wavelength is

62. Propagation of sound waves is proposed by

63. Distance between any two successive compression or rarefaction are called

64. In the Phenomenon of resonance, the natural frequency of two bodies should be

65. The point where the density of the vibrating air molecules is maximum and its rarefaction is minimum

66. Ultra Sonic waves can be generated in

67. Stationary waves carries energy from one point to another

68. Humans can hear sound in range of

69. Transverse waves, pick odd

70. Sound through the solid is

71. Ultra sound wave used to scan the internal organs of the body is

72. Maximum displacement of vibrating particle from its mean point known as

73. If the amplitude of waves decreases with respect to time, then such waves are

74. Units of frequency

75. Light waves propagates in the form

76. Quantum theory of radiation was proposed by

77. Lights wave are

78. According to Huygens’s wave theory, light propagates in the form of

79. According to Newton Corpuscular theory, light particles move with high speed through