A tuning fork of frequency 480 Hz produces 10 beats s - 1 when sounded with a vibrating sonometer string. What must have been the frequency of string if slight increase in tension produces fewer beats s - 1 than before?

Question

A tuning fork of frequency 480 Hz produces 10 beats s - 1 when sounded with a vibrating sonometer string. What must have been the frequency of string if slight increase in tension produces fewer beats s - 1 than before?, 490 Hz, 470 Hz, 460 Hz, 480 Hz

MARKS App · Accepted Answer

Here n 1 = 480 , m = 10 n 2 = n 1 ± m = 480 ± 10 = 490 o r 470 When tension is increased, n 2 will increase ( ∴ n 2 ∝ T ) . As number of beats s - 1 decrease, n 2 = 470 H z

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