AP Physics C: E&M
10.3 Capacitors

Experiment 1: The capacitor is charged to a net charge magnitude \(Q_0\) and then disconnected from the power supply, keeping the charge constant.
Experiment 2: The capacitor remains connected to a battery supplying a constant potential difference \(V_0\).
By what factor does the attractive force between the plates change (ratio \(F_{\text{final}} / F_{\text{initial}}\)) in Experiment 1 and Experiment 2?
| Experiment 1 (Constant Charge \(Q_0\)) | Experiment 2 (Constant Voltage \(V_0\)) | |
|---|---|---|
| (A) | \(2\) | \(\dfrac{1}{2}\) |
| (B) | \(\dfrac{1}{2}\) | \(\dfrac{1}{4}\) |
| (C) | \(1\) | \(\dfrac{1}{4}\) |
| (D) | \(\dfrac{1}{4}\) | \(\dfrac{1}{4}\) |
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