Question

A metal wire of diameter 1 mm is stretched with
a tension of 100N between two bridges 50cm
apart. It vibrates with its fundamental frequency
to produce 5 beats with a tuning fork. The same
number of beats/s are heard when tension is
reduced to 81 N. The frequency of the fork is -
(1) 75 Hz.
(2) 85 Hz
(3) 95 HZ
(4) 105 HZ​

Answer 1

Explanation:

your answer is attached in the photo

hope it helps u mate ☺

Answer 2

  (1) 75 Hz is the answer.