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Question 31349
JEE Physics · Hard

Waves on String: Energy MCQ

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EnergyHardQuestion 31349

Question

A string carries a travelling wave of power P. If wave reaches a fixed boundary and is totally reflected, power of reflected wave:
  1. A
    P
    Correct
  2. B
    2P
  3. C
    P/2
  4. D
    0

Correct answer

P

Explanation

For a perfectly rigid fixed boundary, all energy is reflected: reflected wave has same power P (and amplitude A). This is how standing waves store energy.

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