A standing wave is given by the equation x=10sin5πtcos3x. The amplitude of the wave will be
A
a constant at all times
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B
will be increasing as t increases
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C
will be decreasing as t increases
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D
will fluctuate at x increases
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Solution
The correct option is D will fluctuate at x increases The amplitude of the stationary wave is 10cos3x and this fluctuates as x increases The correct option is (d)