An IDEAL parallel plate capacitor with plate separation d is connected to a batt
ID: 1592185 • Letter: A
Question
An IDEAL parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V Volts. (C is the capacitance, U is the stored energy, and E is the magnitude of the electric field inside the capacitor.) (For each statement select T True, F False).
A) With the capacitor connected to the battery, increasing d increases E.
B) After being disconnected from the battery, decreasing d increases U.
C) After being disconnected from the battery, decreasing d decreases C.
D) After being disconnected from the battery, increasing d increases V.
Explanation / Answer
A) False as E = V/d (increasing d decreases E)
B) False U = Q^2/2C ( decreasing d increases C therefore U decreases )
C) False C is inversely proportional to d
D) True Q = CV increasing d decreases C therefore V increases