Two parallel-plate capacitors have the same plate area,and the gap between the plates is filled with a dielectric with a dielectric constant equal to 6.The gap in capacitor A is three times that in capacitor B.What is the ratio of the capacitance of A to B?
A) 1/3
B) The ratio is not given.
C) 3
D) 18

Question

Quizplus · Accepted Answer

The capacitance of a parallel-plate capacitor is inversely proportional to the distance between the plates. Since the gap in capacitor A is three times that in capacitor B, the capacitance of A is 1/3 of that of B.

Two Parallel-Plate Capacitors Have the Same Plate Area,and the Gap