A 20-µF capacitor is charged to 200 V.Its stored energy is:
A)4000 J
B)4 J
C)0.4 J
D)0.1 J
E)0.004 J

Name: A 20-µF capacitor is charged to 200 V.Its stored energy is: A)4000 J B)4 J C)0.4 J D)0.1 J E)0.004 J
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The formula for the energy stored in a capacitor is:
E = 1/2 * C * V^2
Where E is the energy, C is the capacitance, and V is the voltage.

Plugging in the values given:
E = 1/2 * 20 µF * (200 V)^2
E = 0.4 J

A 20-µF Capacitor Is Charged to 200 V