A light pointer fixed to one prong of a tuning fork touches a vertical plate. The fork is set vibrating and the plate is allowed to fall freely. If eight oscillations are counted when the plate falls through 10 cm, the frequency of the tuning fork is
Text Solution
Verified by ExpertsThe correct answer is:
D
Time of fall = 
In this time number of oscillations are eight.
So time for 1 oscillation = 
Frequency = 
= 56 
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