Part A How much charge does a battery have to supply to a 5.0 ? F capacitor to c

Question

Part A

How much charge does a battery have to supply to a 5.0?F capacitor to create a potential difference of 1.4V across its plates?

Express your answer using two significant figures.

Part B

How much energy is stored in the capacitor in this case?

Express your answer using two significant figures.

Part C

How much charge would the battery have to supply to store 1.5J of energy in the capacitor?

Express your answer using two significant figures.

Part D

What would be the potential across the capacitor in that case?

Express your answer using two significant figures.

PLEASE SHOW ALL WORK! Thanks!

Explanation / Answer

Part A)

Q = CV

Q = (5 X 10-6)(1.4)

Q = 7.0 X 10-6 C

Part B)

E = .5CV2

E = (.5)(5 X 10-6)(1.4)2

E = 4.9 X 10-6 J

Part C)

E = .5QV

1.5 = .5(Q)(1.4)

Q = 2.1 C

Part D)

Q = CV

2.1 = (5 X 10-6)(V)

V = 4.3 X 105 V

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