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 O 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. After being disconnected from the battery, inserting a dielectric with K will decrease U. O A: True o B: Fals After being disconnected from the battery, increasing d increases U. O A: True o B: Fals With the capacitor connected to the battery, inserting a dielectric with k will decrease C. A: TrueB: False After being disconnected from the battery, inserting a dielectric with k will increase V. O A: True o B: Fals After being disconnected from the battery, decreasing d increases C O A: True o B: Fals With the capacitor connected to the battery, decreasing d decreases Q A: TrueB: False

Explanation / Answer

1. after being dissconnected then charge on plate will remain same.

U = Q^2 / 2 C

k will increase C hence U will decrease.

Ans: True

2. C = e0 A / d

increase d will decrease C and U will inxrease.

True.

3.when connected to battery, then potential diff V willnot change.

and C' = k C

so inserting k will increase C.

False

4. Q = C V = constant

C will increase so V will decrease.

False

5. C = e0 A / d

decreasing d will increase C.

True

6.decreasing d will increase C.

and V is constant.

Q = C V

so Q will also increase.

false

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