Question 18
FA student connects two different supplies, X and Y, to a data logger.
The Figure shows how the potential difference of each supply changes with time.
Figure
a.[2]
Identify which supply, X or Y, gives an alternating potential difference.
Give a reason for your answer.
b.[1]
Give one source that could produce the potential difference shown for supply X.
c.[2]
Supply Y completes one cycle every 0.020 s.
Calculate the number of cycles that supply Y completes in one second.
d.[1]
State the name given to the number of cycles completed each second.
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.