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Q.

The amplitude of a damped oscillator becomes 127 th  of its initial value after 6 minutes. Its amplitude after 2 minutes is

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a

A03

b

A09

c

A054

d

A081

answer is A.

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Detailed Solution

For damped oscillator A=A0e-bt Here A027=A0e-6b,A2=A0e-2b=A0e-6b13
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