A heavy brass sphere is hung from a weightless inelastic spring and as a simple pendulum its time period of oscillation is T. When the sphere is immersed in a nonviscous liquid of density 
that of brass, it will act as a simple pendulum of period
A
T
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
The time period of a pendulum in air,
…(i)
being the length of simple pendulum.
In liquid, effective weight of sphere
Apparent weight 
weight of bob in air - upthrust
Apparent weight 
where, 
density of sphere 
where, 
density of liquid.
Thus, 
.
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