Physics (AS & A Level) · Oct / Nov 2024 · Paper 53 · Question 2
9702
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A student investigates an electrical circuit. A power supply of electromotive force (e.m.f.) Es and negligible internal resistance is connected in series to three resistors, each of resistance Z. A cell, an ammeter and a resistor of resistance R are connected in parallel across one of these resistors, as shown in Fig. 2.1. A Z Z Z R Es – + Fig. 2.1 The current I is measured by the ammeter for different values of R. It is suggested that I and R are related by the equation 3E – Es = I(3R + 2Z) where E is the e.m.f. of the cell. 1
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2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(c)(iv)[2]
2(d)(i)[2]
2(d)(ii)[1]
2(e)[1]
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