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Question: Answered & Verified by Expert

A composite wire of length 2L is made by joining two different wires A  and B  having the same length, made of the same material but of different radii r and 2r respectively. The composite wire is vibrating at such a frequency, that the junction of the two wires form a node. If the number of antinodes in the wire A  is p and that in the wire  B  is q , then the ratio p:q is

PhysicsWaves and SoundJEE Main
Options:
  • A 1:2
  • B 3:5
  • C 1:4
  • D 4:9
Solution:
1752 Upvotes Verified Answer
The correct answer is: 1:2

f1=n2TρA;  f2=m2Tρ4A
Given f1=f2
f1f2=nm×2

nm=12

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