Q.

The equation of a stationary wave is given by y=6sin⁡(πx/3)cos⁡40πt where y and x are given in cm and time t in second, then the amplitude of progressive wave is, the time period of the component progressive wave is

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a

20 sec

b

40 sec

c

(1/20) sec

d

(1/10) sec

answer is C.

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Detailed Solution

(2π/T)=40π or T=(1/20)sec
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The equation of a stationary wave is given by y=6sin⁡(πx/3)cos⁡40πt where y and x are given in cm and time t in second, then the amplitude of progressive wave is, the time period of the component progressive wave is