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2 marksCapacitors

CAPE Physics Unit 2 · 2006 · Paper 2 · Question 1(a)

A circuit used to study the discharge of a capacitor through a resistor is shown, with a switch that can connect to contact P to charge or Q to discharge.

Explain how energy is stored in the capacitor when the switch is connected to P.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 1(b)(i)When the switch is connected to Q, discharge occurs following I = I_0 e^{-\frac{t}{RC}}. Use data from the discharge graph to complete Table 1 and plot a…[4 marks]
  2. 1(b)(ii)What is the equation of this new graph?[1 mark]
  3. 1(c)(i)Find the gradient of the graph you have drawn.[1 mark]
  4. 1(c)(ii)Given that R = 47\text{ k}\Omega, deduce the capacitance of the capacitor C.[2 marks]

More practice: the rest of this paper · more Capacitors questions · all CAPE Physics Unit 2 past papers