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Class 12 NEET Physics Electrostatics Questions Part 1

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Question : 29

Total: 100

A parallel plate air capacitor of capacitance C is connected to a cell of emf V and then disconnected from it. A dielectric slab of dielectric constant K, which can just fill the air gap of the capacitor, is now inserted in it. Which of the following is incorrect ?

The energy stored in the capacitor decreasesK times.
The change in energy stored is
1
2
CV2(
1
K
−1)
The charge on the capacitor is not conserved.
The potential difference between the platesdecreases K times.

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