If the distance between two isolated parallel plates that are oppositely charged is doubled,the electric field between the plates is essentially unchanged.However,the:
A)potential difference between the plates will double.
B)charge on each plate will double.
C)force on a charged particle halfway between the plates will get twice as small.
D)force on a charged particle halfway between the plates will get four times as small.

Question

Quizplus · Accepted Answer

The electric field between the plates is given by E = V/d, where V is the potential difference between the plates and d is the distance between them. Since the distance between the plates is doubled but the electric field remains essentially unchanged, the potential difference between the plates must have doubled to maintain the same electric field strength. Therefore, choice A is correct. Choices B, C, and D are not true because the charge on each plate and the force on a charged particle halfway between the plates are not related to the distance between the plates, but rather to other factors such as the magnitude of the charges on the plates and the magnitude of the charge on the particle.

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