When a tuning fork A of unknown frequency is sounded with another tuning fork B of frequency 256 Hz, then 3 beats per second are observed. After that A is loaded with wax and sounded, the again 3 beats per second are observed. The frequency of the tuning fork A is
Text Solution
Verified by ExpertsThe correct answer is:
C
It is given that
n A = Unknown frequency = ?
n B = Known frequency = 256 Hz
x = 3 bps, which remains same after loading
Unknown tuning fork A is loaded so n A ↓ ↓
Hence n A ↓ ↓ – n B = x ... (i) Correct
n B – n A ↓ ↓ = x ... (ii) Wrong
⇒ ⇒ n A = n B + x = 256 + 3 = 259 Hz.
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