Question

Tuning fork A when sounded with a tuning for B of frequency 480 Hz gives 5 beats per second. When the prongs of A are loaded with wax, it gives 3 beats per second. The original frequency of A is
A. 475Hz
B. 485 Hz
C. 483 Hz
D. 477 Hz

Answer 1

Correct Answer - B
Frequency of Tuning fork A may be 475 Hz or 485 Hz, when tuning for A is waxed then frequency of A decreases so original frequency of A is 485 Hz.