A) 240 Hz
B) 250 Hz
C) 260 Hz
D) 270 Hz
Correct Answer: C
Solution :
Unknown frequency\[=256\pm 4\,\,Hz\] \[=260\,\,Hz\,\,or\,\,252\,\,Hz\] When \[A\] is loaded with wax, its frequency decreases, i.e. the number of beats is decreased \[\therefore \]Unknown frequency\[=260\,\,Hz\].You need to login to perform this action.
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