An isolated parallel-plate capacitor of area A1 with an air gap of length s1 is charged up to a potential difference ΔV1. A second parallel-plate capacitor, initially uncharged, has an area A2 and a...

An isolated parallel-plate capacitor of area A1 with an air gap of length s1 is charged up to a potential difference ΔV1. A

second parallel-plate capacitor, initially uncharged, has an area A2 and a gap of length s2 filled with plastic whose dielectric

constant is K. You connect a wire from the positive plate of the first capacitor to one of the plates of the second capacitor,

and you connect another wire from the negative plate of the first capacitor to the other plate of the second capacitor. What

is the final potential difference across the first capacitor?