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A parallel -plate capacitor having plate...

A parallel -plate capacitor having plate area `400 cm ^2` and separation between the plate 1.0mm is connected to a power supply of `100V.` A dielectric slab of thickness1.0mm and dielectric constant 5.0 is inserted into the gap .(a)Find the increase in electrostatic energy .(b) If the power supply is now disconnected and the dielectric slab is taken out , find the further increase in energy. (c) Why does the energy increase in inserting the slab as well as in taking it out?

A

` 5.1 muJ`

B

`1.1 muJ`

C

`7.1 muJ`

D

`9.1 muJ`

Text Solution

Verified by Experts

The correct Answer is:
C
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