CapacitanceMedium
Question
The plate separation in a parallel plate condenser is d and plate area is A. If it is charged to V volt & battery is disconnected then the work done in increasing the plate separation to 2d will be-
Options
A.
B.
C.
D.
Solution
As battery is disconnected, charge remains constant in the work process.
Work done = final potential energy - initial potential energy
=
=
Where , Q = CV =
, C = 
, C′ = 
Now, work done =
Ans. is (D)
Work done = final potential energy - initial potential energy
=
=
Where , Q = CV =
, C = , C′ = Now, work done =
Ans. is (D) Create a free account to view solution
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