A metal-cased tumble dryer is supplied by a cable containing a brown core, a blue core and a green and yellow core inside an outer sheath.
Which part of the cable should be connected directly to the metal casing of the tumble dryer?
The green and yellow core.
The blue core.
The brown core.
The outer sheath.
81 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.