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Q.

Standing waves are produced in a 10 m long stretched string. If the string vibrates in 5 segments and the wave velocity is 20 m/s, the frequency is

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a

5 Hz

b

2 Hz

c

4 Hz

d

10 Hz

answer is C.

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Detailed Solution

5λ2 =10, Therefore λ =4m.

Now f=vλ = 204 =5 Hz

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