What does a dielectric medium inside a capacitor do to an electric fieldWatch
I think the answer is D because of the equation, C= (permittivity of free space x A)/D.
But I don't understand what a dielectric medium inside a capacitor does to an electric field.
A) I am pretty sure, by definition, all capacitors already contain a dielectric medium
B) The electric field across a capacitor (when at least partially charged) is uniform.
C) C = q/V
V = W/q
C = q*q/W
W = Fd
C = q*q/Fd
D) Increasing distance would cause capacitance to decrease
E) Current does not flow between the positively and negatively charged plates
They don't; you can have a perfectly good capacitor with a vacuum between the plates. A is wrong because a dielectric *decreases* the electric field strength between the plates. (Polar molecules align themselves with charges anti-parallel to the plates, so their E field vectors point in the opposite direction to the polarising field).