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Question 31315
JEE Physics · Hard

Waves on String: Power in Waves MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Power in WavesHardQuestion 31315

Question

A wave with intensity I₁ reaches a string junction. If 40% is reflected, transmitted intensity is:
  1. A
    40% of I₁
  2. B
    60% of I₁
    Correct
  3. C
    120% of I₁
  4. D
    0

Correct answer

60% of I₁

Explanation

Energy conservation: I_transmitted = I_incident − I_reflected = I₁ − 0.4I₁ = 0.6I₁ = 60%.

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