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

$C=$ capacitance, $U=$ stored energy and $-Q=$ charge on the plates$).$ Note: Isolated plates can not lose their charge.

hat$(v)$ Increasing the distance increases the Electric field.

hat$(v)$ When the distance is doubled, $U$ increases.

Inserting a dielectric increases $C.$

hat$(v)$ When the distance is doubled, $C$ increases.

Inserting a dielectric decreases $U.$

Inserting a dielectric increases $Q.$

When the distance is halved, Q stays the same.