Physics (AS & A Level) · May / June 2022 · Paper 51 · Question 1

Two parallel metal plates, each of area A, are separated by a small distance d, as shown in Fig. 1.1. d area A metal plates Fig. 1.1 (not to scale) The plates are initially charged using a power supply. The plates are then connected to an uncharged capacitor. The potential difference V across the capacitor is measured. It is suggested that V is related to d by the relationship W V = 1 + Cd KA where C is the capacitance of the capacitor, and K and W are constants. Plan a laboratory experiment to test the relationship between V and d. Draw a diagram showing the arrangement of your equipment. Explain how the results could be used to determine values for K and W. In your plan you should include: ● the procedure to be followed ● the measurements to be taken ● the control of variables ● the analysis of the data ● any safety precautions to be taken. 3 Diagram 4 [15]

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