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Q.

When the air column of a resonance tube is vibrated together with a tuning fork, 3 beats are heard per second, either the temperature of the air column is 510C or 160C. The frequency of the tuning fork is

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a

128 Hz

b

256 Hz

c

98 Hz

d

105 Hz

answer is C.

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Detailed Solution

We now n α T

n1n2=T1T2

n + 3n-3 = 51 + 27316 + 273

n + 3n-3 = 324289

n + 3n-3 = 1817

By solving we get n= 105 Hz

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