Physics (AS & A Level) · May / June 2019 · Paper 53 · Question 2
9702
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The question as text
A student is investigating a rotary variable resistor, as shown in Fig. 2.1. spindle variable resistor Fig. 2.1 The variable resistor is connected to a battery of electromotive force (e.m.f.) E and negligible internal resistance, as shown in Fig. 2.2. A E Fig. 2.2 The student uses a protractor to measure the angle θ through which the spindle of the variable resistor is rotated and records the current I. The experiment is repeated for different angles. It is suggested that I and θ are related by the equation E = IKθ where K is a constant.
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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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