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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