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Question

In damped vibrations, as time progresses, amplitude of oscillation

A
decreases
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B
increases
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C
Remains same
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D
Data insufficient
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Solution

The correct option is A decreases
In damped oscillations, the relation of amplitude of oscillations with time is given by y=yoebt=yoebt, where
yo= initial amplitude of oscillation
t=time
b=damping constant
since b>0&t>0;
ebt>1ebt<1yoebt<yoy<yo
which means that as the time progress, its amplitude will decrease.

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