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MCQOPTIONS
This section includes 1341 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The force which opposes the relative motion between different layers of liquid or gases is called |
| A. | Viscous force |
| B. | Critical velocity |
| C. | Streamline flow |
| D. | Terminal velocity |
| Answer» B. Critical velocity | |
| 152. |
Which is true |
| A. | In a static liquid at same horizontal level, pressure is more at centre |
| B. | In a static liquid at same horizontal level, pressure is less at centre |
| C. | In a static liquid at same horizontal level, pressure is same at all points |
| D. | In a static liquid at same horizontal level, pressure is different at all points |
| Answer» D. In a static liquid at same horizontal level, pressure is different at all points | |
| 153. |
Which law states, "Signifies that good absorbers are good emitters". |
| A. | Stefan's law |
| B. | Doppler's effect |
| C. | Kirchhoff's law |
| D. | Newton's law of cooling |
| Answer» D. Newton's law of cooling | |
| 154. |
Which law states, "the effect produced by a moving source of waves in which there is an apparent upward shift in frequency for observers towards whom the source is approaching and an apparent downward |
| A. | Stefan's law |
| B. | Doppler's effect |
| C. | Kirchhoff's law |
| D. | Newton's law of cooling |
| Answer» C. Kirchhoff's law | |
| 155. |
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. | |
| 156. |
The absorption of ink by blotting paper involves: |
| A. | Viscosity of ink |
| B. | Capillary action phenomenon |
| C. | Diffusion of ink through the blotting |
| D. | Siphon action |
| Answer» C. Diffusion of ink through the blotting | |
| 157. |
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 | |
| 158. |
Moment of inertia is: |
| A. | Vector |
| B. | Scalar |
| C. | Phasor |
| D. | Tensor |
| Answer» E. | |
| 159. |
Siphon will fail to work if: |
| A. | The densities of the liquid in the two vessels are equal. |
| B. | The level of the liquid in the two vessels are at the same height. |
| C. | Both its limbs are of unequal length. |
| D. | The temperature of the liquids in the two vessels are the same. |
| Answer» C. Both its limbs are of unequal length. | |
| 160. |
What is newton first law of motion ? |
| A. | Every body maintains its initial state rest or motion unless no external force is applied |
| B. | The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force |
| C. | To every action there is equal and opposite reaction |
| D. | None of above |
| Answer» B. The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force | |
| 161. |
Ohmic conductor among the following is _____. |
| A. | Transistor |
| B. | Electrolyte |
| C. | Constantum |
| D. | Thermal value |
| Answer» D. Thermal value | |
| 162. |
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 | |
| 163. |
Rectifiers are used to convert: |
| A. | Direct current to alternating current |
| B. | Alternating current to direct current |
| C. | High voltage to low voltage |
| D. | Low voltage to high voltage |
| Answer» C. High voltage to low voltage | |
| 164. |
Light travels at the fastest speed in: |
| A. | Glass |
| B. | Water |
| C. | Hydrogen |
| D. | Vacuum |
| Answer» E. | |
| 165. |
One thousand microns is equal to |
| A. | 10-3m |
| B. | 10-6m |
| C. | 10-9m |
| D. | 10-12m |
| Answer» B. 10-6m | |
| 166. |
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. | |
| 167. |
RADAR is used for: |
| A. | Locating submerged submarines. |
| B. | Receiving a signals in a radio receiver. |
| C. | Locating geostationary satellites. |
| D. | Detecting and locating the position of objects such as aeroplanes. |
| Answer» E. | |
| 168. |
It takes much longer to cook food in the hills than in the plains, because |
| A. | In the hills the atmospheric pressure is lower than that in the plains and therefore water boils at |
| B. | Due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100o |
| C. | In the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere |
| D. | In the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving |
| Answer» B. Due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100o | |
| 169. |
One watt-hour is equivalent to |
| A. | 6.3 x 103 j |
| B. | 6.3 x 10-7 j |
| C. | 3.6 x 103 j |
| D. | 3.6 x 10-3 j |
| Answer» D. 3.6 x 10-3 j | |
| 170. |
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 | |
| 171. |
Mirage is due to: |
| A. | Unequal heating of different parts of the atmosphere |
| B. | Magnetic disturbances in the atmosphere |
| C. | Depletion of ozone layer in the atmosphere |
| D. | Equal heating of different parts of the atmosphere |
| Answer» B. Magnetic disturbances in the atmosphere | |
| 172. |
ML2T-2 is the dimensional formula for |
| A. | Moment of inertia |
| B. | Pressure |
| C. | Elasticity |
| D. | Couple acting on a body |
| Answer» E. | |
| 173. |
Metals are good conductors of electricity because: |
| A. | They contain free electrons. |
| B. | The atoms are lightly packed. |
| C. | They have high melting point. |
| D. | All of the above. |
| Answer» B. The atoms are lightly packed. | |
| 174. |
Force of attraction between the molecules of same substance is called |
| A. | Adhesive force |
| B. | Cohensive force |
| C. | Surface tension |
| D. | None of above |
| Answer» C. Surface tension | |
| 175. |
What is escape velocity ? |
| A. | Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so it do not go beyond gravitational field of earth |
| B. | Escape velocity is the minimum velocity with which a body should be projected from the surface of earth so it do not go beyond gravitational field of earth |
| C. | Escape velocity is the minimum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth |
| D. | Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth |
| Answer» D. Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth | |
| 176. |
What is the maximum value of deforming force upto which a material shows elastic property and above which the material loses it ? |
| A. | Stress |
| B. | Strain |
| C. | Elasticity |
| D. | Elastic limit |
| Answer» E. | |
| 177. |
What is the relation between wavelength, frequency and velocity ? |
| A. | Velocity of wave = wavelength/frequency |
| B. | Velocity of wave = frequency/wavelength |
| C. | Velocity of wave = frequency * wavelength |
| D. | None of above |
| Answer» D. None of above | |
| 178. |
Sudden fall in barometer is indication of |
| A. | Tide |
| B. | Rain |
| C. | Storm |
| D. | Clear weather |
| Answer» D. Clear weather | |
| 179. |
The maximum velocity upto which fluid motion is streamline is called |
| A. | Viscous force |
| B. | Critical velocity |
| C. | Streamline flow |
| D. | Terminal velocity |
| Answer» C. Streamline flow | |
| 180. |
Which law states, "The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature". |
| A. | Stefan's law |
| B. | Doppler's effect |
| C. | Kirchhoff's law |
| D. | Newton's law of cooling |
| Answer» B. Doppler's effect | |
| 181. |
Lognitudinal waves and Transverse waves are types of ? |
| A. | Mechanical waves |
| B. | Non-mechanical waves |
| C. | Both of above |
| D. | None of above |
| Answer» B. Non-mechanical waves | |
| 182. |
Force of attraction between the molecules of different substances is called |
| A. | Adhesive force |
| B. | Cohensive force |
| C. | Surface tension |
| D. | None of above |
| Answer» B. Cohensive force | |
| 183. |
When a body is immersed partly or wholly in a liquid, there is an apparent loss in weight of the body which is equal to the weight of liquid displaced by the body. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Not sured |
| Answer» B. False | |
| 184. |
What is Hooke's Law ? |
| A. | Stress is directly proportional to strain |
| B. | Stress is inversely proportional to strain |
| C. | Stress and strain are dependent on each other |
| D. | Stress and strain are independent of each other |
| Answer» B. Stress is inversely proportional to strain | |
| 185. |
Choke is used to_______. |
| A. | Convert ac to dc |
| B. | Convert dc to ac |
| C. | Reduce the current in ac circuit |
| D. | Reduce the current in dc circuit |
| Answer» D. Reduce the current in dc circuit | |
| 186. |
Electromagnetic spectrum consists of the following radiations I. X-rays II. Gamma rays III. Ultraviolet radiations .Choose the correct order of code in the increasing order of their frequency: |
| A. | I, iii, ii, iv |
| B. | Ii, i, iii, iv |
| C. | Iv, ii, iii, i |
| D. | Iv, iii, i, ii |
| Answer» E. | |
| 187. |
What will be the effect on gravitational acceleration if the earth suddenly stops its rotation? |
| A. | It will reduce at the poles |
| B. | It will increase at the poles |
| C. | It will increase at the equator |
| D. | It will decrease at the equator |
| Answer» C. It will increase at the equator | |
| 188. |
Ball pen works on the principle of ______. |
| A. | Viscosity |
| B. | Boyle?s law |
| C. | Gravitational force |
| D. | Capillarity and surface tension |
| Answer» E. | |
| 189. |
Orbital speed of a satellite is dependent of its mass. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Not sured |
| Answer» C. May be | |
| 190. |
Energy posses by a body in motion is called |
| A. | Potential energy |
| B. | Kinetic energy |
| C. | Both of above |
| D. | None of above |
| Answer» C. Both of above | |
| 191. |
A telescope and microscope differ in that______. |
| A. | Telescope has objective of large focal length and eyepiece of smaller focal lengths |
| B. | Telescope?s eyepiece with longer focal lengths that the oblective |
| C. | Both are different instruments |
| D. | None of these |
| Answer» B. Telescope?s eyepiece with longer focal lengths that the oblective | |
| 192. |
What is newton third law of motion ? |
| A. | Every body maintains its initial state rest or motion unless no external force is applied |
| B. | The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force |
| C. | To every action there is equal and opposite reaction |
| D. | None of above. |
| Answer» D. None of above. | |
| 193. |
The I.C Chip used in a computer is made up of_______. |
| A. | Gold |
| B. | Lead |
| C. | Silicon |
| D. | Chromium |
| Answer» D. Chromium | |
| 194. |
In which among the following is alternating current not used? |
| A. | Refrigeration |
| B. | Electroplating |
| C. | Radio detection |
| D. | Heat production |
| Answer» C. Radio detection | |
| 195. |
Which of the following is an electromagnetic wave ? |
| A. | Sound wave |
| B. | Cathode rays |
| C. | Infra red rays |
| D. | Ultrasonic wave |
| Answer» D. Ultrasonic wave | |
| 196. |
When a body falls in viscous medium, its velocity first increases and finally becomes constant. The constant velocity is called |
| A. | Viscous force |
| B. | Critical velocity |
| C. | Streamline flow |
| D. | Terminal velocity |
| Answer» E. | |
| 197. |
Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings." |
| A. | Stefan's law |
| B. | Doppler's effect |
| C. | Kirchhoff's law |
| D. | Newton's law of cooling |
| Answer» E. | |
| 198. |
Parsec is a unit of_______. |
| A. | Time |
| B. | Energy |
| C. | Pressure |
| D. | Astronomical distance |
| Answer» E. | |
| 199. |
Lightning conductors are made up of _________. |
| A. | Iron |
| B. | Steel |
| C. | Copper |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 200. |
All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Not sured |
| Answer» B. False | |