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MHT CET 2026 (17 Apr, Shift 1) · Beats

Beats question from MHT CET 2026 (17 Apr, Shift 1)

Q11MHT CET 2026 · 17 APR · SHIFT 1Medium

Beats

A and B are two wires whose fundamental frequencies are 256 Hz and 382 Hz respectively. When third harmonic of A and the second harmonic of B are sounded together, the number of beats heard in two second will be

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Answer: (a)

Third harmonic of A: $3 \times 256 = 768\text{ Hz}$ .
Second harmonic of B: $2 \times 382 = 764\text{ Hz}$ .
Beats per second $= 4$ , so in 2 s: $8$ .
So the answer is (a) 8.

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