A parallel-plate capacitor remains connected to a constant battery while the distance…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A parallel-plate capacitor remains connected to a constant

6.0\,\text{V}

battery while the distance between its plates is suddenly doubled. Which of the following gives the ratio of the new charge

Q_{2}

to the original charge

Q_{1}

on the positive plate? (a)

1

(b)

\dfrac14

(c)

\dfrac12

(d)

2