Which statements are true for two oppositely charged, isolated parallel plates:

Question

Which statements are true for two oppositely charged, isolated parallel plates: C=capacitance, U=stored energy (Q and -Q = charge on the plates). Note: Isolated plates can not lose their charge.

T/F Inserting a dielectric increases C.
T/F Inserting a dielectric decreases U.
T/F When the distance is doubled, C increases.
T/F Increasing the distance increases the Electric field.
T/F When the distance is halved, Q stays the same.
T/F Inserting a dielectric increases Q.
T/F When the distance is doubled, U increases.

Explanation / Answer

T Inserting a dielectric increases C.
T Inserting a dielectric decreases U.
F When the distance is doubled, C increases.
F Increasing the distance increases the Electric field.
T When the distance is halved, Q stays the same.
F Inserting a dielectric increases Q.
T When the distance is doubled, U increases.

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