Q. Beats are produced when two progressive waves of frequency 256 Hz ad 260 Hz superpose. Then the resultant amplitude changes periodically with frequency of
A) 256 Hz
B) 260 Hz
C) $\frac{256 - 260}{2}$ Hz
D) 4 Hz
Explanation
(d) Frequency of change of resultant amplitude=number of beats$s^{- 1} = 260 - 256 = 4\ Hz$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.