Physics MCQs For 11 Class Best Physics MCQs Quiz

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let’s start Physics MCQs 11 Class

1. An oscillatory motion is always under
• a. a periodic force
• b. an elastic restoring force of inertia
• c. an elastic restoring forced
• d. an applied force and torque
• Answer: b. an elastic restoring force of inertia
2. simple harmonic motion is the motion
• a. under the influence of damped restoring force
• b. with acceleration proportional to the displacement and oppositely directed.
• c. with acceleration proportional to the time
• d. with acceleration proportional to the displacement
• Answer: b. with acceleration proportional to the displacement and oppositely directed.
3. simple harmonic motion is a type of
• a. irregular motion
• b. periodic motion
• c. spin motion
• d. none of these
• Answer: b. the periodic motion
4. which of the following does not exhibit simple harmonic motion:
• a. A hanging spring supporting a weight, moving up and down
• b. The oscillating balance wheel of a watch
• c. The wheel of an automobile in motion
• d. The plucked string of a violin
• Answer: c. The wheel of an automobile is in motion
5. when a particle is executing S.H.M., it is found the
• a. The acceleration depends upon its displacement
• b. the period depends upon its amplitude of motion
• c. The frequency depends on applied force
• d. The period and frequency are independent of each other
• Answer: a. The acceleration depends upon its displacement
6. If there are no frictional effects, the mechanical energy of a system executing S.H.M
• a. is independent of amplitude
• b. depends on the amplitude
• c. is independent of mass
• d. remains conserved
7. The period of motion of a simple pendulum depends on:
• a. mass
• b. acceleration of gravity
• c. length
• d. b and c
• Answer: d. b and c
8. The motion of a simple pendulum closely approximates SHM provided its maximum angular displacement does not exceed.
• a. 30 degrees
• b. 5 degrees
• c. 60 degrees
• d. 45 degrees
9. with the help of a sonometer, the …….. of vibrating string can be found
• a. acceleration
• b. force
• c. frequency
• d. displacement
10. The velocity of sound in pace (vacuum) at 0.c is
• a. 332m/s
• b. 344m/s
• c. 323m/s
• d. Zero
11. The characteristics of a wave can be explained by three main physical concepts i.e wavelength, frequency and.
• a.acceleration
• b. velocity
• c. time period
• d. displacement
12. …… is not a simple harmonic motion
• a. motion of a simple pendulum
• b. the motion of a swing
• c. motion of a projectile
• d. vibrations of a tuning fork
• Answer: c. motion of a projectile
13. The periodic variation in intensity at a given point due to the superposition of two waves of slightly different frequencies is called:
• a. pitch
• b. doppler effect
• c. SHM
• d. beats
14. When two identical waves are superposed, the velocity of the resultant waves.
• a. increases
• b. decreases
• c. remains unchanged
• d. Become zero
15. Which of the following properties of sound is affected by a change in air temperature:
• a. frequency
• b. amplitude
• c. intensity
• d. wavelength
16. In a stationary wave, nodes are the points having
• a. minimum displacements
• b. minimum weights
• c. maximum displacements
• d. maximum weights
• a. A mechanical transverse wave motion is possible both in gas. metal and string.
• b. A mechanical transverse wave motion is possible in sting and metal but not in gas.
• c. A mechanical transverse wave motion is possible in water and gas
• d. A mechanical transverse wave motion is possible neither in gas nor in metal.
• Answer: b. A mechanical transverse wave motion is possible in sting and metal but no in gas.
18. A sound wave travels from air to water. which one of the following quantities remains unchanged:
• a. intensity
• b. wavelength
• c. frequency
• d. velocity
19. If you go on increasing the stretching force on a wire in a guitar, then its frequency:
• a. increases
• b. decreases
• c. remains unchanged
• d. become zero
20. The value of the velocity of sound is zero is the highest in
• a. Air
• b. space
• c. water
• d. steel
21. The frequency of sound waves audible by humans is;
• a. 5 c/s
• b. 5000 c/s
• c. 27000 c/s
• d. 50000 c/s
22. A spring of force k is cut into 3 equal pieces, The force k of each part will be;
• a. k/3
• b. 3k
• c. k
• d. 9k
23. The Doppler effect applies to
• a. sound waves only
• b. light waves only
• c. heat waves only
• d. both sound waves and light waves.
• Answer; d. both sound waves and light waves.
24. If more ‘weights’ are added to the mass attached with a vibrating spring, its time period:
• a. increases
• b. decreases
• c. remains constant
• d. become zero