Physics

Problem

Three air-filled parallel-plate capacitors have the following plate areas (

A

) and separations (

d

): P: area

A

, separation

d

Q: area

2A

, separation

2d

R: area

\tfrac{1}{2}A

, separation

\tfrac{d}{2}

Rank their capacitances in descending order. a)

Q > P > R

P = Q = R

R > Q > P

Q > R > P