Question

A parallel plate capacitor is made from two plates 7 cm^2 in area, with a plate...

A parallel plate capacitor is made from two plates 7 cm^2 in area, with a plate separation of 3 mm. The capacitor is fully charged across a 30 V battery, and then disconnected.

How much charge is on the capacitor?

Now material with a dielectric constant of 30 is inserted to fill the space between the plates, (with the battery disconnected), What is the charge on the capacitor?

What is the energy stored in the capacitor?

What the field between the plates?

What the potential difference across the capacitor?

How much work do you have to do to insert the dielectric in between the plates?

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