If the tension in the stretched string fixed at both ends is increased by 21%, the fundamental frequency is found to change by 15Hz, Then the
original frequency is 150Hz
velocity of the propagation of the transverse wave along the string increases by 5%
velocity of the propagation of the transverse wave along the string increases by 10%
fundamental wavelength on the string does not chnage
,
Solving, we get f1=150Hz
Hence, increases in v is 10%
fundamnetal wavelength =2
is unchanged
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