PHYSICS-Stationary Waves Questions and Answers

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Q11
The fundamental frequency of a string fixed at both ends is given by:
  • A f = v/2L
  • B f = v/L
  • C f = 2v/L
  • D f = v/4L
Answer: Option A
Explanation: Fundamental frequency formula for string fixed at both ends.
Q12
When a stationary wave is set up in a medium:
  • A Energy is uniformly distributed
  • B Energy is transmitted without loss
  • C Energy alternates between kinetic and potential
  • D Energy decreases exponentially
Answer: Option C
Explanation: Energy alternates between kinetic and potential energy in stationary waves.
Q13
The distance between a node and adjacent antinode is:
  • A λ/2
  • B λ/4
  • C λ
  • D 2λ
Answer: Option B
Explanation: Distance between node and adjacent antinode is λ/4.
Q14
In stationary waves, the particle velocity is maximum at:
  • A Nodes
  • B Antinodes
  • C Both nodes and antinodes
  • D Midpoint between node and antinode
Answer: Option B
Explanation: Particle velocity is maximum at antinodes where amplitude is maximum.
Q15
Which of the following is NOT a characteristic of stationary waves?
  • A Formation of nodes and antinodes
  • B Energy is not transmitted
  • C All particles vibrate with same amplitude
  • D Particles between nodes vibrate in phase
Answer: Option C
Explanation: Stationary waves do not transfer energy from one point to another.
Q16
The formation of stationary waves requires:
  • A Two waves of different amplitudes
  • B Two identical waves traveling in opposite directions
  • C A single wave source
  • D Waves of different frequencies
Answer: Option B
Explanation: Stationary waves need two identical waves traveling in opposite directions.
Q17
In a stationary wave, the amplitude varies with:
  • A Time only
  • B Position only
  • C Both time and position
  • D Neither time nor position
Answer: Option B
Explanation: Amplitude in stationary waves varies with position, not time.
Q18
The frequency of the first overtone of a string fixed at both ends is:
  • A Same as fundamental
  • B Twice the fundamental
  • C Half the fundamental
  • D Four times the fundamental
Answer: Option B
Explanation: First overtone is the second harmonic with frequency 2 times fundamental.
Q19
Stationary waves can be produced in:
  • A Only strings
  • B Only air columns
  • C Only solid rods
  • D Strings, air columns, and rods
Answer: Option D
Explanation: Stationary waves can form in strings, air columns, and rods.
Q20
The wavelength of fundamental mode in an open organ pipe is:
  • A L
  • B 2L
  • C 4L
  • D L/2
Answer: Option B
Explanation: For open pipe, fundamental wavelength is twice the pipe length.

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