Physics (AS & A Level) · Oct / Nov 2022 · Paper 51 · Question 1

A thin copper sheet is suspended from a small hole near the top of the sheet and placed in a magnetic field, as shown in Fig. 1.1. t direction of magnetic field area A copper sheet hole Fig. 1.1 (not to scale) The sheet has area A and thickness t. The sheet is displaced from its equilibrium position through a horizontal distance s0 and then released so that it oscillates perpendicular to the direction of the magnetic field. The horizontal distance s of the sheet from its equilibrium position is measured after five complete oscillations. It is suggested that s is related to A by the relationship s = s0e–ABKt where B is the magnetic flux density of the field and K is a constant. Plan a laboratory experiment to test the relationship between s and A. Draw a diagram showing the arrangement of your equipment. Explain how the results could be used to determine a value for K. 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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