PHYSICS-Stationary Waves Questions and Answers

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Q31
For a pipe open at both ends, the pressure variation is minimum at:
  • A Closed end
  • B Open end
  • C Middle
  • D Quarter length
Answer: Option B
Explanation: In open pipes, pressure nodes occur at open ends.
Q32
The fundamental frequency of a vibrating string depends on:
  • A Length only
  • B Tension only
  • C Mass per unit length only
  • D Length, tension and mass per unit length
Answer: Option D
Explanation: Frequency depends on length, tension, and mass per unit length.
Q33
In a stationary wave, the transfer of energy:
  • A Is maximum
  • B Is zero
  • C Occurs only at nodes
  • D Occurs only at antinodes
Answer: Option B
Explanation: No net energy transfer occurs in stationary waves.
Q34
The number of antinodes in the fundamental mode of an open organ pipe is:
  • A 1
  • B 2
  • C 3
  • D 4
Answer: Option A
Explanation: Fundamental mode in open pipe has 1 antinode at center.
Q35
When a stationary wave is formed, the medium is divided into:
  • A Nodes
  • B Antinodes
  • C Segments or loops
  • D Wavefronts
Answer: Option C
Explanation: Medium is divided into segments called loops.
Q36
The frequency of vibration of a string is inversely proportional to:
  • A Tension
  • B Length
  • C Mass per unit length
  • D Amplitude
Answer: Option B
Explanation: Frequency is inversely proportional to length of string.
Q37
In a stationary wave, the amplitude at any point:
  • A Changes with time
  • B Is constant for each point
  • C Is same for all points
  • D Is zero everywhere
Answer: Option B
Explanation: Amplitude is constant for each point in stationary waves.
Q38
The fundamental frequency of a closed organ pipe compared to open organ pipe of same length is:
  • A Same
  • B Half
  • C Double
  • D Four times
Answer: Option B
Explanation: Closed pipe has half the frequency of open pipe of same length.
Q39
Stationary waves can be produced by:
  • A Reflection only
  • B Refraction only
  • C Superposition of waves
  • D Diffraction only
Answer: Option C
Explanation: Stationary waves result from superposition of waves.
Q40
The particle displacement in a stationary wave is maximum at:
  • A Nodes
  • B Antinodes
  • C Both nodes and antinodes
  • D Midpoints
Answer: Option B
Explanation: Maximum displacement occurs at antinodes.

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