An IDEAL parallel plate capacitor with plate separation d is connected to a batt

Question

An IDEAL parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged ot 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). With the capacitor connected to the battery, increasing d increases C. With the capacitor connected to the battery, increasing d increases E. With the capacitor connected to the battery, increasing d increases U. With the capacitor connected to the battery, increasing d increases V.

Explanation / Answer

FTFT

A) C=e0A/d =====> as d increases, C decreases

B) E=V/d =====>   as d increases, E decreases

C) U =0.5CV^2 ====>   as d increases, U decreases because C decreases

D) Q=CV ======>   as d increases, V increases because after disconnect from battery Q remains constant.

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