One of two identical tuning forks with natural frequency 256Hz, one is loaded so that 4 beats per second are heard when they are sounded together. What is the frequency of the loaded tuning fork?
A
260Hz
B
252Hz
C
248Hz
D
264Hz
E
258Hz
Verified Correct Answer: B.
Physical Principles & Numerical Solution
- When a tuning fork is loaded with wax, the frequency of the tuning fork decreases, I.e when the prongs are loaded, their inertia increases, resulting in decrease of vibrational frequency.
Beat = F2 - F1
4 = 256 - F1
F1 = 252Hz
Source: Myschool Past Questions Archive (Record #28695)