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.
1)Inserting a dielectric increases Q.
2) Inserting a dielectric increases C.
3) Increasing the distance increases the Electric field.
4)When the distance is doubled, C increases.
5) When the distance is doubled, U increases.
6) When the distance is halved, Q stays the same.
7) Inserting a dielectric decreases U.

Explanation / Answer

1)Inserting a dielectric increases Q.-F
2) Inserting a dielectric increases C.-T
3) Increasing the distance increases the Electric field.-F
4)When the distance is doubled, C increases.-F
5) When the distance is doubled, U increases.-T
6) When the distance is halved, Q stays the same.-T
7) Inserting a dielectric decreases U.-T

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