Physics (AS & A Level) · May / June 2023 · Paper 53 · Question 2
9702
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The question as text
A student investigates the discharge of capacitors in the circuit shown in Fig. 2.1. V R CP CQ Fig. 2.1 The capacitors have capacitances CP and CQ. The student closes the switch to charge the capacitors and then records the maximum reading V0 on the voltmeter. The switch is opened and a stop‑watch is started. The capacitors discharge through the resistor and the reading on the voltmeter decreases. When the reading on the voltmeter is V the time t is recorded. The discharge of the capacitors is repeated and the mean time T is calculated. The experiment is repeated for different values of CP and CQ. For each combination of CP and CQ, the combined capacitance C is calculated. It is suggested that C and T are related by the equation ln V V0 = – T CR where R is the resistance of the resistor.
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2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(d)[1]
2(e)(i)[2]
2(e)(ii)[1]
2(f)[2]
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