The plates of a parallel-plate capacitor are maintained with constant potential

Question

The plates of a parallel-plate capacitor are maintained with constant potential by a battery as they are pulled apart. During this process, the amount of charge on the plates

A) must increase.

B) must decrease.

C) must remain constant.

D) could either increase or decrease. There is no way to tell from the information given.

-I read that if the plates are disconnected from the battery and pulled apart, the charge remains constant... but the question does not mention that the plates are disconnected from the battery... Help!

Please explain your reasoning!

Explanation / Answer

B) must decrease.

C = A*epsilon/d

so, as d increases C decreases.

we know, Q = C*V

as C decreses Q also decreases.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.