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.

TrueFalse After being disconnected from the battery, decreasing d increases U.
TrueFalse After being disconnected from the battery, decreasing d increases C.
TrueFalse After being disconnected from the battery, inserting a dielectric with will increase U.
TrueFalse After being disconnected from the battery, inserting a dielectric with will decrease C.
TrueFalse With the capacitor connected to the battery, increasing d decreases Q.
TrueFalse After being disconnected from the battery, inserting a dielectric with will increase V.         

Explanation / Answer

TrueFalse After being disconnected from the battery, decreasing d increases U.--------------------------False
TrueFalse After being disconnected from the battery, decreasing d increases C.--------------------------False
TrueFalse After being disconnected from the battery, inserting a dielectric with will increase U---True.
TrueFalse After being disconnected from the battery, inserting a dielectric with will decrease C.--False
TrueFalse With the capacitor connected to the battery, increasing d decreases Q.------------------------False
TrueFalse After being disconnected from the battery, inserting a dielectric with will increase V. ---False       

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