What happens to the energy stored in a capacitor if the voltage across it is dou

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Question: What happens to the energy stored in a capacitor if the voltage across it is doubled?

Options:

Correct Answer: It quadruples

Solution:

The energy stored in a capacitor is given by U = 1/2 C V². If the voltage is doubled, the energy increases by a factor of four.

What happens to the energy stored in a capacitor if the voltage across it is doubled?

What happens to the energy stored in a capacitor if the voltage across it is doubled?

Step 1: Understand the formula for energy stored in a capacitor, which is U = 1/2 C V².
Step 2: Identify what happens when the voltage (V) is doubled. If the original voltage is V, the new voltage becomes 2V.
Step 3: Substitute the new voltage into the energy formula: U = 1/2 C (2V)².
Step 4: Calculate (2V)², which equals 4V².
Step 5: Now the energy formula becomes U = 1/2 C (4V²).
Step 6: Simplify the formula: U = 2 C V², which shows that the energy is now four times the original energy.
Step 7: Conclude that when the voltage is doubled, the energy stored in the capacitor increases by a factor of four.

Capacitor Energy Storage – The energy stored in a capacitor is proportional to the square of the voltage across it, as described by the formula U = 1/2 C V².