Home Physics Wave and Sound Interference and Superposition of Waves The minimum intensity of sound is zero at a …
Physics Wave and Sound Interference and Superposition of Waves MCQ (Single Correct)

The minimum intensity of sound is zero at a point due to two sources of nearly equal frequencies, when

A
Two sources are vibrating in opposite phase
B
The amplitude of two sources are equal
C
At the point of observation, the amplitudes of two S.H.M. produced by two sources are equal and both the S.H.M. are along the same straight line
D
Both the sources are in the same phase

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The correct answer is:
C

If two waves of nearly equal frequency superpose, they give beats if they both travel in straight line and if they have equal amplitudes.

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