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Q.

A simple pendulum of length 4.9 m is immersed in a liquid of density r = 0.4 kg/m3. Then the time period of pendulum is (density of bob = 0.8kg/m3)

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a

π s

b

3π s

c

2π s

d

π/2 s

answer is C.

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Detailed Solution

T=2plgeff where gef =g1−rs
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