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Question

A source having a frequency of 50 Hz produces sinusoidal waves of amplitude 2 cm and wavelength 5 cm. Represent the equation of wave generated by this source, if this wave moves along +X axis

A
y=2sin40π(5t2x)
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B
y=2sin20π(5t2x)
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C
y=2sin10π(5t2x)
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D
y=2sin10π(5t4x)
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Solution

The correct option is B y=2sin20π(5t2x)
The standard equation for a progressive wave is y=Asin(2πt/Tkx),
Substituting the parameters given in the problem, we get,
y=2sin20π(5t2x)
The correct option is (b)

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