An electrical engineer is analyzing the electrical behavior of two pieces of equipment in a workshop: an electric kiln connected to the standard UK mains supply (230 V, a.c.), and a portable cordless LED work light powered by a 20 V battery (d.c.).
The current passing through the heating element of the kiln is 13.0 A, and the current passing through the LED light's driver circuit is 1.5 A.
Describe two differences between the movement of electric charge in the heating element of the kiln and the movement of electric charge in the LED driver circuit.
10 exam-style questions on Edexcel GCSE Physics 10.4 Mains electricity, covering 10.4.1 Direct and alternating current, 10.4.2 Live, neutral and earth wires; safety, 10.4.3 Mains wire potential differences and dangers, and 10.4.4 Power ratings and energy use. Each one has a worked solution and a mark scheme showing where the marks go.