Calculate the energy stored in 20μF capacitor if the potential difference between the plates is 40 V.
A
3.2 x10-2J
B
1.6x102J
C
8.0x10-4J
D
4.0x10-4J
E
2.0x10-4J
Verified Correct Answer: B.
Physical Principles & Numerical Solution
E = 1/2cv2 = 1/2 x 10 x 10-6 x 402 = 1.6 x 10-2J
Source: Myschool Past Questions Archive (Record #24290)