MCQOPTIONS
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MCQOPTIONS
This section includes 754 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
To find the r.m.s value of an alternating current mathematically we need to have ________________? |
| A. | Mean value of I2 |
| B. | Square root of mean value of I2 |
| C. | Square root of I2 |
| D. | Square of 1/2 |
| Answer» C. Square root of I2 | |
| 152. |
Time rate of change of momentum is equal to____________________? |
| A. | force |
| B. | impulse |
| C. | velocity |
| D. | both A and C |
| Answer» B. impulse | |
| 153. |
Three students measured the length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is a correct record ? |
| A. | Only (i) |
| B. | Only (ii) |
| C. | Only (iii) |
| D. | Both (i) and (ii) |
| Answer» D. Both (i) and (ii) | |
| 154. |
Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ? |
| A. | 40 W |
| B. | 90W |
| C. | 100W |
| D. | 120W |
| Answer» C. 100W | |
| 155. |
Three coplanar forces acting on a body keep it in equilibrium. They should therefore be_______________? |
| A. | Concurrent |
| B. | Non-concurrent |
| C. | Parallel |
| D. | Non-parallel |
| Answer» B. Non-concurrent | |
| 156. |
Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains ? |
| A. | 40 W bulb |
| B. | 60 W blub |
| C. | 100 W blub |
| D. | all will burn equally brightly |
| Answer» B. 60 W blub | |
| 157. |
Thermocouples convert___________________? |
| A. | heat energy into electrical energy |
| B. | heat energy into light energy |
| C. | heat energy into mechanical energy |
| D. | mechanical energy into heat energy |
| Answer» B. heat energy into light energy | |
| 158. |
Thermions are________________? |
| A. | protons |
| B. | positrons |
| C. | electrons |
| D. | photons |
| Answer» D. photons | |
| 159. |
There are three bulbs of 60W 100W and 200W which bulb has thickest filament ? |
| A. | 100W |
| B. | 200W |
| C. | 60W |
| D. | all |
| Answer» C. 60W | |
| 160. |
The__________branch of Physics deals with nuclear particles such as neutrons, protons and nuclear? |
| A. | Solid State Physics |
| B. | Plasma Physics |
| C. | structure is called |
| D. | Nuclear Physics |
| E. | Particle Physics |
| Answer» E. Particle Physics | |
| 161. |
The working of transistor as amplifier is similar to________________? |
| A. | Step up transformer |
| B. | Step down transformer |
| C. | Three diodes in common |
| D. | Triode vacuum tube |
| Answer» E. | |
| 162. |
The work done in the isochoric process is________________? |
| A. | constant |
| B. | variable |
| C. | zero |
| D. | depends on situation |
| Answer» D. depends on situation | |
| 163. |
The work done by friction is__________________? |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | none of these |
| Answer» C. zero | |
| 164. |
The waves that require a material medium for their propagation are called__________________? |
| A. | matter waves |
| B. | electromagnetic waves |
| C. | carrier waves |
| D. | mechanical waves |
| Answer» E. | |
| 165. |
The waveform of S.H.M. is________________? |
| A. | Standing wave |
| B. | Sine wave |
| C. | Square wave |
| D. | None |
| Answer» C. Square wave | |
| 166. |
The velocity of the mass attached to a spring is maximum at_______________? |
| A. | Mean position |
| B. | Extreme position |
| C. | Both A and B |
| D. | None |
| Answer» B. Extreme position | |
| 167. |
The velocity of an oscillating charge as it moves to and fro along a wire is always_____________? |
| A. | constant |
| B. | zero |
| C. | changing |
| D. | infinite |
| Answer» D. infinite | |
| 168. |
The velocity of sound is greatest in___________________? |
| A. | Water |
| B. | air |
| C. | copper |
| D. | ammonia |
| Answer» D. ammonia | |
| 169. |
The velocity of sound in air would become double than its velocity at 0°C at temperature________________? |
| A. | 313°C |
| B. | 586°C |
| C. | 819°C |
| D. | 1172°C |
| Answer» D. 1172°C | |
| 170. |
The velocity of sound in air would become double than its velocity at 0°C at temperature ? |
| A. | 313°C |
| B. | 586°C |
| C. | 819°C |
| D. | 1172°C |
| Answer» D. 1172°C | |
| 171. |
The velocity of light was determined accurately by_______________? |
| A. | Newton |
| B. | Michelson |
| C. | Huygen |
| D. | Young |
| Answer» C. Huygen | |
| 172. |
The velocity of laser light is___________________? |
| A. | Less than ordinary light |
| B. | More than ordinary light |
| C. | Equal to ordinary light |
| D. | Different for different colours or frequency |
| Answer» D. Different for different colours or frequency | |
| 173. |
The velocity of a particle of mass m of de-Broglie wavelength λ is______________? |
| A. | v = 3 ×× 106 ms-1 |
| B. | v = 2 ×× 10 ms-1 |
| C. | v = 2 ×× 6 ms-1 |
| D. | v = 2 ×× 106 ms-1 |
| Answer» E. | |
| 174. |
The value of the steady current which when flowing through the same resistor produces heat at the same rate as the mean rate of heat produced by the alternating current is__________________? |
| A. | Average current |
| B. | Sinusoidal current |
| C. | r.m.s current |
| D. | Net current |
| Answer» D. Net current | |
| 175. |
The value of resistivity for insulator is of the order of____________? |
| A. | 105 ohm metre |
| B. | 106 ohm metre |
| C. | 107 ohm metre |
| D. | 108 ohm metre |
| Answer» E. | |
| 176. |
The value of critical angle for glass is_______________? |
| A. | 42° |
| B. | 47° |
| C. | 52° |
| D. | 50° |
| Answer» B. 47° | |
| 177. |
The value of γ for diatomic gas is_______________? |
| A. | 1.67 |
| B. | 1.4 |
| C. | γ = 1.3 |
| D. | None |
| Answer» C. γ = 1.3 | |
| 178. |
The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________? |
| A. | 2i^ – 2j^ + k^ |
| B. | (2i^ – 2j^ +k^)/9 |
| C. | (2i^ – 2j^ +k^)/3 |
| D. | (2i^ – 2j^ +k^)/5 |
| Answer» D. (2i^ – 2j^ +k^)/5 | |
| 179. |
The unit of radioactivity curie is equal to________________? |
| A. | 3.74 x 109 disintegration per sec |
| B. | 3.70 x 1010 disintegration per sec |
| C. | 3.55 x 1010 disintegration per sec |
| D. | 3.60 x 1010 disintegration per sec |
| Answer» C. 3.55 x 1010 disintegration per sec | |
| 180. |
The unit of radioactivity curie is equal to_________________? |
| A. | 3.74 x 109 disintegration per sec |
| B. | 3.70 x 1010 disintegration per sec |
| C. | 3.55 x 1010 disintegration per sec |
| D. | 3.60 x 1010 disintegration per sec |
| Answer» C. 3.55 x 1010 disintegration per sec | |
| 181. |
The unit of force is _________ and its symbol is ______________ Which is the correct pair ? |
| A. | Newton, n |
| B. | Newton, N |
| C. | newton, n |
| D. | newton, N |
| Answer» E. | |
| 182. |
The unit of entropy is________________? |
| A. | J.K |
| B. | J/K |
| C. | N.m/sec |
| D. | Kgm2/sec2.K |
| Answer» B. J/K | |
| 183. |
The unit of coefficient of linear expansion or volume expansion is__________? |
| A. | K |
| B. | K-1 |
| C. | K -2 |
| D. | none |
| Answer» C. K -2 | |
| 184. |
The uncertainty in momentum & position is due to its_____________? |
| A. | Property of matter and radiation |
| B. | Two-dimensional motion |
| C. | Emission of the certain wavelength |
| D. | Very high velocity |
| Answer» B. Two-dimensional motion | |
| 185. |
The uncertainty in a measurement may occur due to_______________? |
| A. | Limitation of an instrument |
| B. | Natural variation of the object to be measured |
| C. | Inadequate technique |
| D. | All given in A, B and C |
| Answer» E. | |
| 186. |
The turning effect of force is called_________? |
| A. | Moment |
| B. | Momentum |
| C. | Torque |
| D. | None of these |
| Answer» B. Momentum | |
| 187. |
The trajectory (or path) of a projectile is_________________? |
| A. | straight line |
| B. | parabola |
| C. | hyperbola |
| D. | circle |
| Answer» C. hyperbola | |
| 188. |
The total energy of a body executing S.H.M is directly proportional to________________? |
| A. | The square root of amplitude |
| B. | The amplitude |
| C. | Reciprocal of amplitude |
| D. | Square of an amplitude |
| Answer» E. | |
| 189. |
The time period of a second pendulum is______________? |
| A. | 4 seconds |
| B. | 3 seconds |
| C. | 2 seconds |
| D. | 6 seconds |
| Answer» D. 6 seconds | |
| 190. |
The tides raise the mater in the see roughly in a day___________________? |
| A. | once |
| B. | twice |
| C. | four time |
| D. | eight time |
| Answer» C. four time | |
| 191. |
The thrust on the rocket in the absence of gravitational force of attraction is__________________? |
| A. | Constant |
| B. | not constant |
| C. | constant if the rate of ejected gases is constant |
| D. | constant for short range rocket |
| Answer» B. not constant | |
| 192. |
The symbol of the prefix used for Mega is_______? |
| A. | G |
| B. | h |
| C. | M |
| D. | E |
| Answer» D. E | |
| 193. |
The standard vector symbol for flux density is ____________________? |
| A. | M |
| B. | L |
| C. | H |
| D. | B |
| Answer» C. H | |
| 194. |
The speed of the fluid is maximum in the venturi meter at_______________? |
| A. | Convergent duct |
| B. | Divergent duct |
| C. | Throat |
| D. | None of these |
| Answer» E. | |
| 195. |
The speed of stationary waves in a stretched string are independent of___________________? |
| A. | Number of loops |
| B. | Tension in the string |
| C. | Point where string is plucked |
| D. | both A and C |
| Answer» E. | |
| 196. |
The speed of sound in hydrogen is _____________ time than that in oxygen? |
| A. | Two times |
| B. | Three times |
| C. | Four time |
| D. | Six time |
| Answer» D. Six time | |
| 197. |
The specially designed semi-conductor diodes used as fast counters in electronic circuits are______________? |
| A. | The light emitting diodes |
| B. | Photo diodes |
| C. | Photo voltaic cell |
| D. | Solar cells. |
| Answer» C. Photo voltaic cell | |
| 198. |
The specially designed semi-conductor diodes used as fast counters in electronic circuits are_______________? |
| A. | The light emitting diodes |
| B. | Photo diodes |
| C. | Photo voltaic cell |
| D. | Solar cells |
| Answer» C. Photo voltaic cell | |
| 199. |
The span of the broad jump depends upon_______________? |
| A. | Mass of the jumper |
| B. | Height of jump |
| C. | Angle of projection |
| D. | None |
| Answer» D. None | |
| 200. |
The source of tidal energy is____________________? |
| A. | sun |
| B. | earth |
| C. | both A and B |
| D. | moon |
| Answer» E. | |