Physics (AS & A Level) · Feb / March 2024 · Paper 52 · Question 2
9702
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A student investigates an electrical circuit. A power supply with negligible internal resistance is connected to six resistors, each of resistance Z, and a resistor of resistance R, as shown in Fig. 2.1. A power supply Z R Z Z Z Z Z Fig. 2.1 The current measured by the ammeter is I. The experiment is repeated for different values of R. It is suggested that I and R are related by the equation E = 3IR + 4IZ where E is the electromotive force (e.m.f.) of the power supply. 1
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