Physics JAMB

From the diagram below; calculate the energy stored in the capacitor?

A. 4.0 x 10−²J
B. 4.0 x 10^−4J
C. 8.0 x 10^−4J
D. 8.0 x 10−²

Correct Answer:

Option B – 4.0 x 10^−4J

Explanation

c = 8µF, v = 10v

Energy stored = ½cv²

= ½× (8 × 10− 6) × 10²

= 4 × 10^−4

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