Question 9
FThe Figure shows two ways, A and B, of connecting a lamp and a switch to the mains supply.
Figure
a.[1]
The switch is open in both circuits.
State whether the lamp is lit in each circuit.
b.[3]
An electrician needs to replace the lamp.
Explain why circuit B is dangerous for the electrician, even though the switch is open.
c.[2]
Explain why circuit A is safer than circuit B when the switch is open.
10.4 Mains electricity Questions
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.