The plates of a parallel-plate capacitor have constant chargesof +Q and -Q. Do the following quantities increase, decrease,or remain the same as a dielectric is inserted between the plates?(a) The electric field between the plates; (b) the potential difference between the plates; (c) the capacitance; (d) the energy storedin the capacitor.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.