JAMB Physics 1991 Question 30

Question 30

Sound

Two tuning forks of frequencies 256 Hz and 260 Hz are sounded close to each other. What is the frequency of the beats produced?

  1. A.2 Hz
  2. B.4 Hz
  3. C.8 Hz
  4. D.258 Hz
Show the answer and explanation

Answer: B (4 Hz)

Explanation

Beat frequency = difference of the two frequencies = 260 − 256 = 4 Hz.