MCQOPTIONS
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MCQOPTIONS
This section includes 281 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
A particle revolves round a circular path with a constant speed the acceleration of the particle is |
| A. | Along the circumference of the circle |
| B. | Along the tangent |
| C. | Along the radius |
| D. | Zero |
| Answer» D. Zero | |
| 202. |
An ideal liquid flows through a horizontal tube of variable diameter. The pressure is lowest where the |
| A. | Velocity is highest |
| B. | Velocity is lowest |
| C. | Diameter is largest |
| D. | None of these |
| Answer» B. Velocity is lowest | |
| 203. |
A pendulum clock is set to give correct time at the sea level. This clock is moved to a hill station at an altitude of 2500 m above the sea level. In order to keep correct time on the hill station, the length of the pendulum |
| A. | Has to be reduced |
| B. | Has to be increased |
| C. | Needs no adjustment |
| D. | None of these |
| Answer» B. Has to be increased | |
| 204. |
The earth revolves round the sun in one year. If the distance between them becomes double, the period of revolution will be |
| A. | 1 / 2 year |
| B. | 2 2 years |
| C. | 4 years |
| D. | 8 years |
| Answer» C. 4 years | |
| 205. |
A spring balance is graduated at sea level. If a body is weighed with this balance at consecutively increasing heights from the earth's surface, the weight indicated by the balance will |
| A. | Go on increasing continuously |
| B. | Go on decreasing continuously |
| C. | Remain the same |
| D. | First increase and then decrease |
| Answer» C. Remain the same | |
| 206. |
Weightlessness |
| A. | Absence of inertia |
| B. | Absence of gravity |
| C. | Absence of accelerating force |
| D. | Free fall of the spaceship |
| Answer» C. Absence of accelerating force | |
| 207. |
When the external torque on a system is zero, there will be conservation of its |
| A. | Linear momentum |
| B. | Angular momentum |
| C. | Total energy |
| D. | None of these |
| Answer» D. None of these | |
| 208. |
Erg X Sec |
| A. | Angular momentum |
| B. | Linear momentum |
| C. | Planck's constant |
| D. | Energy |
| Answer» D. Energy | |
| 209. |
An iron piece and a wooden piece have equal weights in air. If they are removed from air to vacuum |
| A. | The iron piece appears to weight more |
| B. | The wooden piece appears to weigh more |
| C. | There is no change in the weight of either |
| D. | None of the above. |
| Answer» C. There is no change in the weight of either | |
| 210. |
Which of the following physical quantity is dimensionless? |
| A. | Angle |
| B. | Strain |
| C. | Specific gravity |
| D. | All of these |
| Answer» E. | |
| 211. |
If the radius of the earth's orbit becomes one fourth of the present value, the deviation of one year will become |
| A. | 8 times |
| B. | 4 times |
| C. | 1 / 8 times |
| D. | 1 / 4 times |
| Answer» D. 1 / 4 times | |
| 212. |
A body moves with a constant speed along a curved path its acceleration |
| A. | Is zero |
| B. | Is parallel to its velocity |
| C. | Can make any arbitrary angle with its velocity |
| D. | Is perpendicular to its velocity |
| Answer» E. | |
| 213. |
A car accelerates from rest with acceleration 1.2 m/s |
| A. | 17 s |
| B. | 8 s |
| C. | 20 s |
| D. | 12 s |
| Answer» D. 12 s | |
| 214. |
Five equal forces of 10 N each are applied at one point and all are lying in one plane. If angles between them are equal, the resultant of these forces will be. |
| A. | Zero |
| B. | 10 N |
| C. | 20 N |
| D. | 102 N |
| Answer» B. 10 N | |
| 215. |
If temperature rises, the coefficient of viscosity of liquid |
| A. | Devreases |
| B. | Lincreases |
| C. | Remains unchanged |
| D. | None of these |
| Answer» B. Lincreases | |
| 216. |
The period of a satellite in a circular orbit of radius R is T. The period of another satellite in circular orbit of radius 4 R is |
| A. | 4 T |
| B. | T / 4 |
| C. | T / 8 |
| D. | 8 T |
| Answer» E. | |
| 217. |
The surface tension phenomenon is the result of the tendency of a system of |
| A. | Conserve energy |
| B. | Keep P.E. minimum |
| C. | Conserve volume |
| D. | Keep surface area minimum |
| Answer» E. | |
| 218. |
Surface tension |
| A. | Nature of the liquid |
| B. | Temperature of the liquid |
| C. | Atmospheric pressure |
| D. | All of the above |
| Answer» E. | |
| 219. |
When some |
| A. | Increases |
| B. | Decreases |
| C. | Remains unaffected |
| D. | None of these |
| Answer» E. | |
| 220. |
Fat |
| A. | Cohesive force |
| B. | Gravitational force |
| C. | Centripetal force |
| D. | Centrifugal force |
| Answer» E. | |
| 221. |
A liquid drop tends to assume a spherical shape because of |
| A. | Surface tension |
| B. | viscous force |
| C. | Gravitational force |
| D. | Elastic force |
| Answer» B. viscous force | |
| 222. |
Distance of stars |
| A. | Galactic unit |
| B. | Seller mile |
| C. | Cosmic kilometre |
| D. | Light year |
| Answer» E. | |
| 223. |
If the earth were to stop rotating, the value of 'g' |
| A. | Increases |
| B. | Decreases |
| C. | Remain unchanged |
| D. | Becomes zero |
| Answer» B. Decreases | |
| 224. |
Two masses, each equal to m, are attached to one another by a massless string passing over a smooth pulley the tension in the string is |
| A. | mg |
| B. | 2 mg |
| C. | mg / 2 |
| D. | zero |
| Answer» B. 2 mg | |
| 225. |
The minimum number of non-zero non-collinear vectors required to produce a zero vector is |
| A. | 3 |
| B. | 2 |
| C. | 4 |
| D. | 1 |
| Answer» B. 2 | |
| 226. |
If we move from the equator to a pole, the value of g |
| A. | Increases |
| B. | Decreases |
| C. | Remain unchanged |
| D. | None of these |
| Answer» B. Decreases | |
| 227. |
For a body moving with constant speed in a horizontal circle, which of the following remains constant? |
| A. | Velocity |
| B. | Acceleration |
| C. | Centripetal force |
| D. | KE |
| Answer» E. | |
| 228. |
Which of the following physical quantities do not have same dimensions? |
| A. | Force and Preesure |
| B. | Work and Energy |
| C. | Impulse and Monentum |
| D. | Weight and Force |
| Answer» B. Work and Energy | |
| 229. |
If the momentum of a body is increased by 50%, its K.E. will increase by |
| A. | 100% |
| B. | 125% |
| C. | 150% |
| D. | 200% |
| Answer» C. 150% | |
| 230. |
A bag is dropped from an aeroplane flying horizontally at a constant speed. Neglecting air resistance, where will the aeroplane be when the bag reaches the ground? |
| A. | Firectly above the bag |
| B. | Ahead of the bag |
| C. | Behind the bag |
| D. | Fata is not sufficient |
| Answer» B. Ahead of the bag | |
| 231. |
A body is lifted by a man to height of 1 m in 30 seconds. Another man lifts the same mass to the same height in 60 seconds. the work done by them are in the ratio |
| A. | 1 : 2 |
| B. | 1 : 1 |
| C. | 2 : 1 |
| D. | 4 : 1 |
| Answer» C. 2 : 1 | |
| 232. |
If a bomb dropped from an |
| A. | Its KE increases |
| B. | Its total energy decreases |
| C. | Its total energy decreases |
| D. | Its total momentum decreases |
| Answer» B. Its total energy decreases | |
| 233. |
'Dynamic lift' |
| A. | Bernoulli's theorem |
| B. | Archimedes' principle |
| C. | Equation of continuity |
| D. | Pascal's law |
| Answer» B. Archimedes' principle | |
| 234. |
A gale blows over a house. The force due to the gale on the roof is |
| A. | In the downward direction |
| B. | In the upward direction |
| C. | Zero |
| D. | Horizontal |
| Answer» C. Zero | |
| 235. |
A block of ice is floating in a glass containing water. When the ice malts completely, the level of the water in the glass will |
| A. | Rise |
| B. | Fall |
| C. | Not change |
| D. | None of these |
| Answer» B. Fall | |
| 236. |
A steel ball is floating in a beaker containing mercury. It some water is poured in the beaker, the steel ball will |
| A. | Move up |
| B. | Move down |
| C. | Continue in its position |
| D. | Execute vertical oscillation |
| Answer» B. Move down | |
| 237. |
A simple harmonic oscillator has time period T. The time taken by it to travel from the extreme position to half the amplitude is |
| A. | T / 6 |
| B. | T / 4 |
| C. | T / 3 |
| D. | T / 2 |
| Answer» B. T / 4 | |
| 238. |
The pressure at the bottom of a liquid tank does not depend on |
| A. | Acceleration due to gravity |
| B. | Density of the liquid |
| C. | Height of the liquid |
| D. | Area of the liquid surface |
| Answer» E. | |
| 239. |
A man is on a frictionless horizontal plane. It is possible for him to get off the plane by |
| A. | Spitting or sneezing |
| B. | Rolling his body on the surface |
| C. | Running |
| D. | None of the above |
| Answer» B. Rolling his body on the surface | |
| 240. |
The total energy of a particle vibrating in |
| A. | Velocity |
| B. | Acceleration |
| C. | Amplitude |
| D. | None of these |
| Answer» D. None of these | |
| 241. |
A simple pendulum is oscillating in a lift, the lift starts moving upwards with a uniform acceleration, the period will |
| A. | Remain unaffected |
| B. | Be shorter |
| C. | Be longer |
| D. | None of these |
| Answer» C. Be longer | |
| 242. |
A small and a |
| A. | The large drop moves faster |
| B. | The small drop moves faster |
| C. | Both moves with same speed |
| D. | None of the above |
| Answer» B. The small drop moves faster | |
| 243. |
A small drop falls from rest from a large height h in air. The final velocity is |
| A. | Almost independent of h |
| B. | Proportional to h |
| C. | Proportional to h |
| D. | Inversely proportional to h |
| Answer» B. Proportional to h | |
| 244. |
When the terminal velocity is reached, the acceleration of a body moving through a viscous medium is |
| A. | Zero |
| B. | Positive |
| C. | Negative |
| D. | None of these |
| Answer» B. Positive | |
| 245. |
Water drops |
| A. | Lack of adhesive force |
| B. | Surface tension |
| C. | Cannot mix each other |
| D. | Water is lighter than oil |
| Answer» B. Surface tension | |
| 246. |
Newton's first law |
| A. | Law of moments |
| B. | Law of inertia |
| C. | Law of energy |
| D. | Law of momentum |
| Answer» C. Law of energy | |
| 247. |
The mass of moon is 1 / 81 of earth's mass and its radius is 1 / 4 of that of earth. If the escape velocity from the earth's surface is 11.2 km/s, is value for the moon is |
| A. | 0.14 km/s |
| B. | 0.5 km/s |
| C. | 2.5 km/s |
| D. | 5.0 km/s |
| Answer» D. 5.0 km/s | |
| 248. |
The equation v |
| A. | Newton's first law |
| B. | Newton's second law |
| C. | Newton's third law |
| D. | None of these |
| Answer» E. | |
| 249. |
A train of length 150 m is going towards north with speed of 10 m/s. A parrot flies at a speed of 5 m/s towards south parallel to railway track. The time taken by the parrot to cross the train is |
| A. | 12 s |
| B. | 8 s |
| C. | 15 s |
| D. | 10 s |
| Answer» E. | |
| 250. |
The tendency of liquid drop to contract and occupy minimum area due to |
| A. | Surface tension |
| B. | viscosity |
| C. | Density |
| D. | Vapour pressure |
| Answer» B. viscosity | |