Q.
The mass of a 4 m wire is 0.01 kg and it is stretched by a force of 400 N. What is the speed of transverse wave in the wire?
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a
400 m/s
b
200 m/s
c
800 m/s
d
None
answer is A.
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Detailed Solution
Speed of transverse wave in a wire is v=FμWhere F is the tension and μ is mass per unit length of the wire.Here F = 400 N and μ=0.01kg4m=.0025kg/m ∴v=400.0025=400m/s
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