Published by:
CGP EDU Academic Team
Published on: September 13, 2026
A capacitor 
is first charged fully with potential difference of 
and disconnected from the battery. The charged capacitor is connected across an inductor having inductance 
. In 
of the initial energy in the capacitor is transferred to the inductor. The value of 
is 
s.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
In an LC circuit, energy oscillates sinusoidally.
Initial energy in capacitor is 
.
When 
is transferred to the inductor, 
remains in the capacitor.
Since energy in capacitor varies as 
, we need 
.
This gives 
, so 
, yielding 
.
With 
, we get 
seconds.
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