Physics · May / June 2018 · Paper 11 · Question 20

When a piece of smouldering rope is held at the opening of the box in the diagram, smoke moves in the direction indicated. [diagram: smouldering rope, smoke, glass fronted box, burning candle] What is responsible for the movement of the smoke?

1. Aconvection
2. Bmovement of free electrons
3. Cradiation
4. Dvibration of molecules

As printed in the paper