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Question

The transverse displacement of a string clamped at its both ends in given by
y(x,T)=2sin(2π3x)cos(100πt) Where x and y are in cm and t is in s. Which of the following statement is correct?

A
All the points on the string between two consecutive nodes vibrate with same frequency, phase and amplitude.
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B
All the points on the string between two consecutive nodes vibrate with same frequency, phase but different amplitude.
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C
All the points on the string between two consecutive nodes vibrate with different frequency and phase but same amplitude.
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D
All the points on the string between two consecutive nodes vibrate with different frequency, phase and amplitude.
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Solution

The correct option is B All the points on the string between two consecutive nodes vibrate with same frequency, phase but different amplitude.
The given equation is
y(x,t)=2sin(2π3x)cos(100πt)
It represents a stationary wave. Therefore, all the points between consecutive nodes vibrate with same frequency and same but different amplitude.

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