Question Detail
Question
A battery is used to charge a parallel-plate capacitor, after which it is disconnected. Then the plates are pulled apart to twice their original separation. This process will double the:
Correct Answer
Option C is the correct answer.
Detailed Explanation
Q constant, C = ε₀A/d → d doubles → C halves. U = Q²/(2C) → C halves → U doubles. E = σ/ε₀ constant (σ constant).
Hint
U = Q²/(2C), C ∝ 1/d.