Question: What is the total energy stored in a capacitor of capacitance 20 microfarads charged to 10 volts?
Options:
Correct Answer: 0.1 joule
Solution:
Energy (E) stored in a capacitor is given by E = 0.5 * C * V^2. Thus, E = 0.5 * 20 x 10^-6 F * (10 V)^2 = 0.1 joules.