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. (also, give me the reasons of how you came up with the answer so I can learn the concept                     myself)
                    
                    1.With the capacitor connected to the battery, inserting a dielectric with K will decrease C.
                    2.After being disconnected from the battery, decreasing d increases U.
                    3.With the capacitor connected to the battery, increasing d decreases Q.
                    4.After being disconnected from the battery, inserting a dielectric with K will increase V.
                    5.After being disconnected from the battery, decreasing d decreases C.
                    6.After being disconnected from the battery, inserting a dielectric with K will decrease

Explanation / Answer

1.With the capacitor connected to the battery, inserting a dielectric with K will decrease C.---false
2.After being disconnected from the battery, decreasing d increases U.------true
3.With the capacitor connected to the battery, increasing d decreases Q.------true
4.After being disconnected from the battery, inserting a dielectric with K will increase V.----flase
5.After being disconnected from the battery, decreasing d decreases C.-----flase
6.After being disconnected from the battery, inserting a dielectric with K will decrease-( something missing here , is it E or V)

both E and V wwill decrease

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