Selected MCQ

Current Question
For a damped harmonic oscillator, critical damping corresponds to:
  • A. Fastest return to equilibrium without oscillation
  • B. Largest amplitude oscillation
  • C. Zero restoring force
  • D. Constant total energy
Correct Answer: A
Explanation:
Critical damping is the threshold between oscillatory and non-oscillatory motion with minimum settling time.
Related Question 1
The ground state energy of a quantum harmonic oscillator is:
  • A. Zero
  • B. (\frac{1}{2}h\nu)
  • C. (h\nu)
  • D. Infinite
Correct Answer: B
Explanation:
Zero-point energy is half quantum energy.
Related Question 2
In quantum mechanics, expectation value of an observable corresponds to:
  • A. Most probable value
  • B. Average measurement over many identical systems
  • C. Minimum energy
  • D. Maximum probability
Correct Answer: B
Explanation:
Expectation value is statistical mean of repeated measurements.
Related Question 3
Which statement about simple harmonic motion is correct?
  • A. Acceleration is proportional to displacement and in the same direction
  • B. Velocity is maximum at extreme position
  • C. Total energy varies sinusoidally
  • D. Acceleration is proportional to displacement and opposite in direction
Correct Answer: D
Explanation:
SHM requires a restoring acceleration opposite to displacement.