MCQOPTIONS
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MCQOPTIONS
This section includes 93 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
__Rainbow is due to__ |
| A. | absorption of sunlight in minute water droplets |
| B. | diffusion of sunlight through water droplets |
| C. | ionisation of water deposits |
| D. | refraction and reflection of sunlight by water droplets |
| Answer» E. | |
| 52. |
__Optical fibre works on the__ |
| A. | principle of refraction |
| B. | total internal reflection |
| C. | scattering |
| D. | interference |
| Answer» C. scattering | |
| 53. |
_Planets are$? |
| A. | luminous heavenly bodies revolving around a star |
| B. | non-luminous heavenly bodies |
| C. | luminous heavenly bodies that twinkle |
| D. | luminous heavenly bodies that do not twinkle |
| Answer» C. luminous heavenly bodies that twinkle | |
| 54. |
_It is easier to roll a stone up a sloping road than to lift it vertical upwards because$? |
| A. | Work done in rolling is more than in lifting. |
| B. | Work done in lifting the stone is equal to rolling it. |
| C. | Work done in both is same but the rate of doing work is less in rolling. |
| D. | Work done in rolling a stone is less than in lifting it. |
| Answer» E. | |
| 55. |
Intensity of sound has$? |
| A. | an object existence |
| B. | a subject existence |
| C. | no existence |
| D. | both subjective and objective existence |
| Answer» B. a subject existence | |
| 56. |
Superconductors are substances which$? |
| A. | conduct electricity at low temperature |
| B. | offer high resistance to the flow of current |
| C. | offer no resistance to the flow of electricity |
| D. | conduct electricity at high temperatures |
| Answer» D. conduct electricity at high temperatures | |
| 57. |
Suitable impurities are added to a semiconductor depending on its use. This is done in order to$? |
| A. | increase its life |
| B. | enable it to withstand higher voltages |
| C. | increase its electrical conductivity |
| D. | increase its electrical resistivity |
| Answer» D. increase its electrical resistivity | |
| 58. |
Inside an aeroplane, flying at a high altitude,$? |
| A. | the pressure is the same as that outside. |
| B. | normal atmospheric pressure is maintained by the use of air pumps. |
| C. | the pressure inside is less than the pressure outside. |
| D. | normal humidity and partial vacuum are maintained. |
| Answer» C. the pressure inside is less than the pressure outside. | |
| 59. |
Point A is at a lower electrical potential than point B. An electron between them on the line joining them will$? |
| A. | Move towards A |
| B. | Move towards B |
| C. | Move at right angles to the line joining A and B |
| D. | Remain at rest |
| Answer» C. Move at right angles to the line joining A and B | |
| 60. |
It is more difficult to walk on a sandy road than on a concrete road because$? |
| A. | sand is soft and concreter is hard. |
| B. | the friction between sand and feet is less than that between concrete and feet. |
| C. | the friction between sand and feet is more than that between concrete and feet. |
| D. | the sand is grainy but concrete is smooth. |
| Answer» C. the friction between sand and feet is more than that between concrete and feet. | |
| 61. |
Pick out the scalar quantity$? |
| A. | Force |
| B. | Pressure |
| C. | Velocity |
| D. | Acceleration |
| Answer» C. Velocity | |
| 62. |
Planets do not twinkle because$? |
| A. | They emit light of a constant intensity |
| B. | Their distance from the earth does not change with time |
| C. | They are very far away from the earth resulting in decrease in intensity of light |
| D. | They are nearer to earth and hence we receive a greater amount of light. |
| Answer» E. | |
| 63. |
Light year is a unit of$? |
| A. | Time |
| B. | Distance |
| C. | Light |
| D. | Intensity of light |
| Answer» C. Light | |
| 64. |
Intensity of sound at a point is ____ its distance from the source.$? |
| A. | directly proportional to |
| B. | inversely proportional to |
| C. | directly proportional to square of |
| D. | inversely proportional to square of |
| Answer» E. | |
| 65. |
Identify the vector quantity from the following$? |
| A. | Heat |
| B. | Angular momentum |
| C. | Time |
| D. | Work |
| Answer» C. Time | |
| 66. |
Isotopes of an element contain$? |
| A. | the same number of protons but different number of neutrons |
| B. | the same number of neutrons but different number of protons |
| C. | equal number of protons and electrons |
| D. | equal number of nucleons |
| Answer» B. the same number of neutrons but different number of protons | |
| 67. |
On a stationary sail boat, air is blown from a fan attached to the boat. The boat$? |
| A. | moves in opposite direction in which the air is blown |
| B. | does not move |
| C. | moves in the same direction in which air blows |
| D. | spins around |
| Answer» C. moves in the same direction in which air blows | |
| 68. |
Mercury is commonly used as a thermometric fluid rather than water because$? |
| A. | specific heat of mercury is less than water |
| B. | specific heat of mercury is more than water |
| C. | mercury has greater visibility than water |
| D. | density of mercury is more than the water |
| Answer» D. density of mercury is more than the water | |
| 69. |
Natural radioactivity was discovered by? |
| A. | Marie Curie |
| B. | Ernest Rutherfor |
| C. | Henri Becquerel |
| D. | Enrico Fermi |
| Answer» D. Enrico Fermi | |
| 70. |
Minimum number of unequal vectors which can give zero resultant are |
| A. | two |
| B. | three |
| C. | four |
| D. | more than four |
| Answer» C. four | |
| 71. |
Oil raise up the wick in a lamp. The principle involves |
| A. | the diffusion of oil through the wick |
| B. | the liquid state of oil |
| C. | capillary action phenomenon |
| D. | volatility of oil |
| Answer» D. volatility of oil | |
| 72. |
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because: |
| A. | mercury is a metal. |
| B. | density of mercury is greater than that of water. |
| C. | cohesion of mercury is greater than its adhesion with glass. |
| D. | cohesion of water is greater than its adhesion with glass. |
| Answer» D. cohesion of water is greater than its adhesion with glass. | |
| 73. |
Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'? |
| A. | Rainbow |
| B. | Earthshine |
| C. | Halo |
| D. | Mirage |
| Answer» E. | |
| 74. |
On a rainy day, small oil films on water show brilliant colours. This is due to |
| A. | dispersion |
| B. | interference |
| C. | diffraction |
| D. | polarization |
| Answer» C. diffraction | |
| 75. |
Magnetism at the centre of a bar magnet is |
| A. | minimum |
| B. | maximum |
| C. | zero |
| D. | minimum or maximum |
| Answer» D. minimum or maximum | |
| 76. |
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same: |
| A. | Velocity |
| B. | Momentum |
| C. | Acceleration |
| D. | Kinetic energy |
| Answer» C. Acceleration | |
| 77. |
Pa(Pascal) is the unit for |
| A. | Thrust |
| B. | Pressure |
| C. | Frequency |
| D. | Conductivity |
| Answer» C. Frequency | |
| 78. |
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons? |
| A. | 1.8 km, 0.15 km |
| B. | 2.2 km, 0.20 km |
| C. | 2.8 km, 0.25 km |
| D. | 3.3 km, 0.30 km |
| Answer» E. | |
| 79. |
Solar eclipse will take place when |
| A. | the sun is between the moon and the earth |
| B. | the earth is between the moon and the sun |
| C. | the moon is between the sun and the earth |
| D. | the moon does not lie on the line joining the sun and the earth |
| Answer» D. the moon does not lie on the line joining the sun and the earth | |
| 80. |
Mach number is used in connection with the speed of |
| A. | sound |
| B. | aircraft |
| C. | spacecraft |
| D. | ships |
| Answer» C. spacecraft | |
| 81. |
Out of the following pairs, which one does not have identical dimension? |
| A. | Moment of inertia and moment of a force |
| B. | Work and Torque |
| C. | Angular momentum and Planck's constant |
| D. | Impulse and Momentum |
| Answer» B. Work and Torque | |
| 82. |
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this? I.DiffusionII.RefractionIII.Internal reflection |
| A. | I, II and III |
| B. | I and II |
| C. | II and III |
| D. | I and III |
| Answer» D. I and III | |
| 83. |
Which of the following terms is not used in the field of physics? |
| A. | Latent heat |
| B. | Nuclear fusion |
| C. | Refractive index |
| D. | Stock value |
| Answer» E. | |
| 84. |
It is easier to roll a barrel full of coal tar than to pull it because |
| A. | the full weight of the barrel comes into play when it is pulled |
| B. | the rolling friction is much less than the sliding friction |
| C. | more surface area of the barrel is in contact with the road when it is pulled |
| D. | coal tar is a liquid and it flows in the barrel when it is rolled |
| Answer» C. more surface area of the barrel is in contact with the road when it is pulled | |
| 85. |
Sound travels at the fastest speed in |
| A. | steel |
| B. | water |
| C. | air |
| D. | vacuum |
| Answer» B. water | |
| 86. |
Moment of inertia is: |
| A. | Vector |
| B. | Scalar |
| C. | Phasor |
| D. | Tensor |
| Answer» E. | |
| 87. |
Lux is the SI unit of |
| A. | intensity of illumination |
| B. | luminous efficiency |
| C. | luminous flux |
| D. | luminous intensity |
| Answer» B. luminous efficiency | |
| 88. |
Sound waves in air are |
| A. | transverse |
| B. | longitudinal |
| C. | electromagnetic |
| D. | polarised |
| Answer» C. electromagnetic | |
| 89. |
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to: |
| A. | The heating effect of current alone |
| B. | Hysteresis loss alone |
| C. | Both the heating effect of current and hysteresis loss |
| D. | Intense sunlight at noon |
| Answer» D. Intense sunlight at noon | |
| 90. |
On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because |
| A. | metals have higher thermal capacity than plastics |
| B. | plastics have a lower density than metals |
| C. | metals are good conductor of heat |
| D. | plastics have a higher thermal conductivity than metals |
| Answer» D. plastics have a higher thermal conductivity than metals | |
| 91. |
In which of the following industries is mica as a raw material? |
| A. | Cement |
| B. | Glass and Pottery |
| C. | Iron and Steel |
| D. | Electrical |
| Answer» E. | |
| 92. |
Supersonic plane fly with the speed |
| A. | less than the speed of sound |
| B. | of sound |
| C. | greater than the speed of sound |
| D. | of light |
| Answer» D. of light | |
| 93. |
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit |
| A. | X-rays |
| B. | ultraviolet light |
| C. | visible light |
| D. | radio waves |
| Answer» D. radio waves | |