Two tuning forks 
and 
, produce notes of frequencies 258 Hz and 262 Hz. An unknown note sounded with 
produces certain beats. When the same note is sounded with B, the beat frequency gets doubled. The unknown frequency is
Text Solution
Verified by ExpertsThe correct answer is:
C
1. 
If it produces 
beats with 258 Hz and 
with 262 Hz
unknown frequency 
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