Oscillations MCQs – Class 11 Physics

Class: CBSE Class 11
Subject: Physics
Section: Oscillations and Waves
Topic: Oscillations MCQs – Class 11 Physics
Board: CBSE Board Examination (Strictly NCERT Based)

Q1. Oscillatory motion is a motion which:

A) Moves in straight line only
B) Repeats itself after equal intervals of time
C) Moves with constant velocity
D) Stops after some time

Answer: B — Oscillatory motion repeats itself about a mean position after equal time intervals.

Q2. One complete oscillation means:

A) Motion from mean to extreme only
B) Motion from one extreme to the other
C) Motion from one extreme back to the same extreme
D) Motion from mean to extreme and stop

Answer: C — One complete oscillation is a full to-and-fro motion.

Q3. Time period is defined as:

A) Number of oscillations per second
B) Time taken for half oscillation
C) Time taken for one complete oscillation
D) Total time of motion

Answer: C — Time period is the time for one complete oscillation.

Q4. Frequency is measured in:

A) second
B) hertz
C) radian
D) metre

Answer: B — Frequency is measured in hertz (Hz).

Q5. Relation between frequency and time period:

A) f = T
B) f = 1/T
C) f = T²
D) f = 2πT

Answer: B — Frequency is reciprocal of time period.

Q6. Maximum displacement from mean position is called:

A) Time period
B) Frequency
C) Amplitude
D) Phase

Answer: C — Amplitude is the maximum displacement from mean position.

Q7. In oscillatory motion, velocity is maximum at:

A) Extreme position
B) Mean position
C) Both positions
D) Zero position only

Answer: B — Velocity is maximum at the mean position.

Q8. Acceleration in oscillatory motion is maximum at:

A) Mean position
B) Halfway position
C) Extreme position
D) Everywhere same

Answer: C — Acceleration is maximum at extreme positions.

Q9. Restoring force in oscillatory motion is always directed:

A) Away from mean position
B) Towards mean position
C) Along velocity direction
D) Perpendicular to motion

Answer: B — Restoring force acts towards the mean position.

Q10. The SI unit of angular frequency is:

A) Hz
B) rad/s
C) m/s
D) s

Answer: B — Angular frequency is measured in rad/s.

Q11. Oscillatory motion is an example of:

A) Translatory motion
B) Periodic motion
C) Random motion
D) Rotational motion

Answer: B — Oscillatory motion is periodic in nature.

Q12. If frequency of oscillation increases, time period:

A) Increases
B) Decreases
C) Remains same
D) Becomes zero

Answer: B — Time period decreases when frequency increases.

Q13. Unit of amplitude is:

A) metre
B) second
C) hertz
D) radian

Answer: A — Amplitude has unit of displacement, metre.

Q14. Which quantity remains constant in ideal oscillatory motion?

A) Velocity
B) Acceleration
C) Total energy
D) Displacement

Answer: C — Total mechanical energy remains constant.

Q15. Kinetic energy of oscillating particle is maximum at:

A) Extreme position
B) Mean position
C) Halfway
D) Everywhere same

Answer: B — Kinetic energy is maximum at mean position.

Q16. Potential energy is maximum at:

A) Mean position
B) Halfway position
C) Extreme position
D) Everywhere same

Answer: C — Potential energy is maximum at extreme positions.

Q17. The phase of oscillation represents:

A) Speed of motion
B) Direction of motion
C) State of motion at any instant
D) Energy of motion

Answer: C — Phase indicates the state of oscillation at any instant.

Q18. Simple harmonic motion is a special case of:

A) Random motion
B) Periodic motion
C) Uniform motion
D) Circular motion

Answer: B — SHM is a special type of periodic motion.

Q19. Which graph represents oscillatory motion?

A) Straight line
B) Parabola
C) Sinusoidal curve
D) Hyperbola

Answer: C — Oscillatory motion is represented by a sinusoidal graph.

Q20. The restoring force in SHM is proportional to:

A) Velocity
B) Acceleration
C) Displacement
D) Time

Answer: C — Restoring force is proportional to displacement.

Q21. The value of angular frequency depends on:

A) Amplitude only
B) Mass and force constant
C) Phase
D) Time period only

Answer: B — Angular frequency depends on system parameters.

Q22. Which quantity does not change during oscillation?

A) Velocity
B) Acceleration
C) Energy
D) Displacement

Answer: C — Total energy remains constant.

Q23. In oscillatory motion, work done over one complete cycle is:

A) Maximum
B) Minimum
C) Zero
D) Infinite

Answer: C — Net work done in one complete oscillation is zero.

Q24. Oscillatory motion is possible due to:

A) External force only
B) Constant velocity
C) Restoring force
D) Gravity alone

Answer: C — Restoring force causes oscillations.

Q25. Phase difference between two identical oscillations is measured in:

A) second
B) hertz
C) radian
D) metre

Answer: C — Phase difference is measured in radians.

Q26. Oscillations with constant amplitude are called:

A) Damped oscillations
B) Forced oscillations
C) Free oscillations
D) Resonant oscillations

Answer: C — Free oscillations occur with constant amplitude.

Q27. Damped oscillations show:

A) Increasing amplitude
B) Constant amplitude
C) Decreasing amplitude
D) Infinite amplitude

Answer: C — Amplitude decreases due to energy loss.

Q28. Forced oscillations occur due to:

A) Gravity only
B) External periodic force
C) Restoring force only
D) No force

Answer: B — Forced oscillations are due to external periodic force.

Q29. Resonance occurs when:

A) Driving frequency equals natural frequency
B) Driving frequency is zero
C) Amplitude is zero
D) Damping is maximum

Answer: A — Resonance occurs when frequencies match.

Q30. The phenomenon of resonance results in:

A) Minimum amplitude
B) Zero energy
C) Maximum amplitude
D) No oscillation

Answer: C — Resonance produces maximum amplitude.

Oscillations MCQs – Class 11 Physics

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