CAPE Physics Unit 2 · May/June 2025 · Paper 2 · Question 1(b)(v)

In an experiment to measure the resistivity of an unknown metal, ρ, a sample of the metal was drawn into a wire of diameter 2 mm and length 30 m. A current of 2 A was passed through the wire and the voltage drop, V, across different lengths of wire, L, was measured and recorded in Table 1.

Calculate the power dissipated by the wire during the experiment.

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