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  • Two tuning forks, A and B produce nodes of frequencies 258 Hz and 262 Hz. An unknown node sounded which produces certain beats. When the same node is sounded with, the beat frequency gets doubled.

Two tuning forks, A and B produce nodes of frequencies 258 Hz and 262 Hz. An unknown node sounded which produces certain beats. When the same node is sounded with, the beat frequency gets doubled. The unknown frequency is

Option: 1

256 Hz


Option: 2

254 Hz


Option: 3

300 Hz


Option: 4

280 Hz


Answers (1)

best_answer

given, V_{A} = 258 Hz, V_{B}=262 Hz

Let V is the frequency of unknown tuning fork. It produces x beats with 258 and 2x with 262

262-(258-x)=2x

262-258=2x-x

x=4

\therefore The unknown frequency is 280 Hz

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