CAPE Physics Unit 2 · May/June 2022 · Paper 2 · Question 1(c)(iii)

An alternative circuit analysis shows that the current I_L through resistor R_L is given by the equation I_L = I_E * [1 + (R_L / 6)]^-1, where I_E is a constant. An experiment was conducted where R_L was varied and corresponding values of I_L were recorded, as shown in Table 1.

Use the graph in (c)(ii) to determine the value of I_E.

This question uses a figure or table from the paper — you'll see it when you practise.