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Question

A pulse on a string is shown in the figure. If P is a particle of the string, then state which of the following are correct?


A
If P is stationary point, then pulse consists of two waves travelling towards each other
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B
If P is moving upwards, then pulse is travelling in positive direction
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C
If P is moving downwards, then pulse is travelling in negative direction
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D
none
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Solution

The correct options are
A If P is stationary point, then pulse consists of two waves travelling towards each other
B If P is moving upwards, then pulse is travelling in positive direction
C If P is moving downwards, then pulse is travelling in negative direction


P can't be stationary if there is no interference.

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