A) On a string clamped at both the ends
B) On a string clamped at one end and free at the other
C) When incident wave gets reflected from a wall
D) When two identical waves with a phase difference of p are moving in the same direction
Correct Answer: A
Solution :
Standing waves can be produced only when two similar type of waves (same frequency and speed, but amplitude may be different) travel in opposite directions.
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