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A tuning fork is vibratin with constant frequency and amplitude. If the air is heated without changing pressure the following quantities will increase

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A tuning fork is vibratin with constant frequency and amplitude. If the air is heated without changing pressure the following quantities will increase.
A. Wavelength
B. Frequency
C. Velocity
D. Time period
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Correct Answer - A::C
`V prop sqrt(T)` , `V` increase , `lambda` increase
(because frequency is constant)
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