CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1 · Question Q13

Item 13 refers to the diagram below showing thermal energy being transformed through an engine. What is the efficiency of the engine?

1. (A)\frac{P}{Q}
2. (B)\frac{P}{P + Q}
3. (C)\frac{P - Q}{P}
4. (D)\frac{Q - P}{Q}

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