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Q.

A tuning fork produces a wave of wavelength 110 cm in air at 00C. The wavelength at 25oC would be

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a

110 cm

b

115 cm

c

130 cm

d

120 cm

answer is B.

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Detailed Solution

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v=γRTM⇒v∝T⇒λ∝T

λ2λ1=T2T1⇒273+27273=1+252731/2

λ110=1+25546 ⇒λ=1101+25546

≈110+11025550≈115 cm

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