A parallel plate capacitor with plate separation d is connected to a battery. Th

Question

A 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. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged by a battery. For each statement below, select True or False. After being disconnected from the battery, inserting a dielectric with k will decrease V. After being disconnected from the battery, decreasing d decreases C. After being disconnected from the battery, increasing d increases V. After being disconnected from the battery, decreasing d increases U. After being disconnected from the battery, inserting a dielectric with k will decrease C. With the capacitor connected to the battery, inserting a dielectric with k will increase U.

Explanation / Answer

Q = CV, C= kCO

V = Vo/k

C = Aeo/d

E = Vd

U = (1/2)CV^2

True, False, False, True, False, True

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