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Capacitance (A-level only)

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Question 34

The initial electrostatic potential energy stored in a capacitor is $E_s$ . The capacitor discharges through a resistor in a circuit with a time constant $τ\tau$ . The base of natural logarithms is $e$ . What is the energy stored in the capacitor after a time $τ\tau$ ?

$Ese\frac{E_s}{e}$

$Ese2\frac{E_s}{e^2}$

$Es2\frac{E_s}{2}$

$E_s \ln 2$

Markscheme

Capacitance (A-level only) Questions

A Level
Physics
Capacitance (A-level only)

63 exam-style questions on AQA A Level Physics Capacitance (A-level only), covering Capacitance (A-level only), Parallel plate capacitor (A-level only), Energy stored by a capacitor (A-level only), and Capacitor charge and discharge (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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