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Questions  

A simple pendulum is vibrating in an evacuated chamber, it will oscillate with 

a
Increasing amplitude
b
Constant amplitude
c
Decreasing amplitude
d
First (c) then (a)

detailed solution

Correct option is B

As it is clear that in vacuum, the bob will not experience any frictional force. Hence, there shall be no dissipation therefore, it will oscillate with constant amplitude.

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