Physics (AS & A Level) · Feb / March 2022 · Paper 42 · Question 5

The variation with potential difference V of the charge Q on one of the plates of a capacitor is shown in Fig. 5.1. 0 2 4 6 8 10 V / V Q / 10–4 C 12 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 Fig. 5.1 The capacitor is connected to an 8.0 V power supply and two resistors R and S as shown in Fig. 5.2. R 25 kΩ S 220 kΩ 8.0 V X Y Fig. 5.2 The resistance of R is 25 kΩ and the resistance of S is 220 kΩ. The switch can be in either position X or position Y.

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