A potential difference is applied to the plate of a capacitor filled with an insulator, with energy stored in the capacitor as U. The capacitor is disconnected and the insulator is pulled out now. The work done in pulling out the insulator against electric field is 4U. Find the dielectric constant of the insulator. ___

A potential difference is applied to the plate of a capacitor filled w

1.	A potential difference is applied to the plate of a capacitor filled with an insulator, with energy stored in the capacitor as U. The capacitor is disconnected and the insulator is pulled out now. The work done in pulling out the insulator against electric field is 4U. Find the dielectric constant of the insulator. ___
Answer» A potential difference is applied to the plate of a capacitor filled with an insulator, with energy stored in the capacitor as U. The capacitor is disconnected and the insulator is pulled out now. The work done in pulling out the insulator against electric field is 4U. Find the dielectric constant of the insulator. ___

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