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Important Physics MCQs sample for preparation of Lecturer test

January 21, 2021

Important Physics MCQs sample for preparation of Lecturer test

Important Physics MCQs sample for preparation of Lecturer test
Important Physics MCQs sample for preparation of Lecturer test

1. What is the best conductor of electricity?– Saltwater

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2. Which is used as a coolant in nuclear reactors?– Liquid sodium

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3. Optic fibres are mainly used for which purpose?– Communication

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4. Mesons are found in which rays?– Cosmic rays

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5. Old-written material, which cannot be read easily, how can be read?– By infrared rays

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6. In an atomic nucleus, by which forces are neutrons and protons held together?– Exchange forces

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7. Which purified oil does Aviation fuel for jet aeroplanes consist?– Kerosene

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8. Who received Nobel Prize twice for the same subject?– Marie Curie

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9. What does Every object at a temperature above absolute zero?– Radiates energy

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10. By whom was Electron first identified?– J. J. Thomson

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11. In our houses we get 220 V A. C What does the value 220 represent?– Effective voltage

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12. What does the rise of mercury in a barometer indicate?– Fairweather

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13. What is the energy of the winds and the waves?– Kinetic

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14. If the temperature of a semiconductor rises, what is its resistivity?– Decrease

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15. How does Transfer of heat energy from the sun to the moon take place?– By radiation only

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16. A fan produces a feeling of comfort during hot weather. Why?– Our perspiration evaporates rapidly

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17. Why are Clear nights cooler than cloudy nights?– Because of radiation

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18. In which transmission is sound and video signals transmitted simultaneously?– T.V. Transmission

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19. Which is the most efficient engine?– Electric

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20. Between which bodies is one Astronomical Unit the average distance?– Earth and the Sun

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Important Physics MCQs sample for preparation of Lecturer test

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21. To an astronaut, how does outer space appear?– Black

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22. When iron rusts, how is its weight?– Increases

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23. Which is the colour of the outer edge of the rainbow?– Red

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24. Of which iron is Core of transformer made up?– Soft iron

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25. Whose experiments proved that the speed of light was always the same?– Michelson and Morley

26. Which is the unit of activity of a radioactive source?– Becquerel

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27. In a sitar wire which type of vibration is produced?– Stationary transverse

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28. Which common devices work on the basis of the principle of mutual induction?– Transformer

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29. Through which material does sound travel slowest?– Wood

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30. Which is printed on a commonly used fluorescent tube light?– 6500 k

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31. How must be The lines of force of a uniform magnetic field?– Parallel to each other

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32. Which would expand the most on being heated?– Air

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33. What will be best colours for a Sun umbrella?– White on top and black on inside

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34. What do we use in SONAR?– Ultrasonic waves

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35. A body has a mass of 6 kg on the Earth; when measured on the Moon, what would be its mas?– 6 kg

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36. At the time of short-circuit, what will be the current in the circuit?– Increases heavily

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37. How can one distinguish a telescope from a microscope?– By observing the size of the lens

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38. Which sound-produced by a bat?– Ultrasonic

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39. How is the frequency of ultrasound wave typically?– Above 20,000 kHz

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40. By which impact is Nuclear fission is caused ?– Neutron

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41. The wavelength of X-rays is of the order of how many angstroms?– 1 Angstrom

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42. Which of the following is used as ‘a moderator in a nuclear reactor?– Graphite

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43. Which of the following is good nuclear fuel?– Plutonium-239

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44. What is the wavelength of visible spectrum?– 3900-7600 A

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45. In which technology do Cryogenic engines find applications?– Rocket technology

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46. In a refrigerator, by which is cooling is produced?– By the evaporation of a volatile liquid

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47. Which polymer is widely used for making bulletproof material?– Polyethylene

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48. Who is the recipient of the Nobel Prize for the development of Wireless Telegraphy?– Marconi

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49. Who laid the foundation of nuclear science in the country?– Homi J. Bhabha

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50. What happens to the level of mercury in the barometer tube when it is taken down a coal mine?– It rises

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51. A convex mirror makes a good rear-view mirror for a car. Why?– It forms erect, reduced images

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52. ‘mho’ is the unit of which unit?– Specific resistance

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53. What is the approximate velocity of light per second?– 3 × 108 m

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54. If one wants to throw a cricket ball to the maximum distance, then at which angle should he throw it ?– 45°

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55. How are Air-pockets that cause aircraft to lose altitude suddenly caused?– Temperature inversions

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56. Which pairs of rays is electromagnetic in nature?– x-rays and gamma rays

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57. Speed of sound is greater in solids than in liquids?– Because the solids have high elasticity

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58. Why does a bubble of water shine?– Because of total internal reflection

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59. With which instrument can a sailor in a submarine see the objects on the surface of sea?– Periscope

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60. On which principle does Rocket work?– Conservation of momentum

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61. The hydraulic brakes used in automobiles is a direct application of which law?– Pascal’s law

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62. One horsepower is equal to how many watts?– 746 watts

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63. What is the number of basic units in the International System of Units?– 7

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64. If you swim one km, how many miles do you swim?– 0.62

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65. The pH of water at 25°C is 7. When it is heated to 100°C, then what will be the pH of water?– Remains the same

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66. How can the quantity of water vapour the atmosphere hold increases?– With the increase of temperature

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67. When milk is churned, how does the cream separate from it?– Due to the centrifugal force

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68. We cannot see during a fog. why?– Because of the scattering of light

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69. In storms, the roofs of some houses are carried away. According to whom is this?– Bernoulli’s principle

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70. Why is the phenomenon of mirage?– Due to total internal reflection

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71. Which law is involved in the act of cleaning a carpet by beating it with a stick?– First law of motion

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72. Which remains constant while throwing a ball upward?– Acceleration

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73. DC current can be controlled by which component?– Resistance

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74. Which radiation carries maximum energy?– Gamma-rays

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75. Which is a good conductor of electricity?– Human body

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76. On which conservation law, does a rocker work?– Angular momentum

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77. What denotes the smallest temperature?– 1° on the Kelvin scale

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78. What is the function of heavy water in a nuclear reactor?– Slow down the speed of neutrons

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79. Which has the least penetrating power?– Alpha particles

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80. Which rays are most penetrating?– y-rays

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81. The mass-energy relation is the outcome of which theory?– Special theory of relativity

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82. Recoil of a gun is an example of which thing?– Conservation of linear momentum

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83. By whom was Neutron discovered?– Chadwick

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84. Which are the best and the poorest conductors of heat respectively?– Silver (Ag), and lead (Pb)

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85. When light passes from air into the glass it experiences a change in which things?– Wavelength and speed

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86. The working of optical is based on which of electromagnetic waves?– Total internal reflection

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87. Soap is used in washing. Why?– It lowers the surface tension of water

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88. Sound travels faster in which thing?– Iron than in air

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89. Why is the term ‘hydroponics’ used?– To describe the cultivation of plants in water

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90. When the greatest pressure exerted on the ground by a man?– When he stands on the toes of one foot

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91. ‘Hydraulic brakes’ and ‘Hydraulic lift’ are devices, why are fluids used in them?– For transmitting pressure

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92. In an atomic explosion, enormous energy is released why?– Due to the conversion of mass into energy

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93. Why is a moderator used in nuclear reactors?– In order to slow down the speed of neutrons

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94. What will be the best colour(s) for a sun umbrella?– White on top and black on the inside

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95. How should a man wearing spectacles work with a microscope?– He should keep on wearing spectacles

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96. What does the emission of ß-particle?– Increases the atomic number by one

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97. On which does Kinetic Energy depend?– Both mass and velocity of the moving body

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98. Which are the discovery of Einstein?– Theory of relativity and the photoelectric effect

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99. When does Superconductivity result?– When the matter is cooled to very low temperature

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100. What does a permanent magnet repel?– Diamagnetic substances only

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