Question 2
FA student connects two different supplies, P and Q, to an oscilloscope in turn.
The Figure shows the trace produced by each supply.
Figure
a.[1]
Which trace, P or Q, shows an alternating potential difference?
b.[1]
Name one source of direct potential difference.
c.[2]
Describe the difference between a direct potential difference and an alternating potential difference.
d.[1]
The UK mains supply is alternating.
State the frequency of the UK mains supply.
8.2 Powering Earth Questions
16 exam-style questions on OCR GCSE Physics 8.2 Powering Earth, covering 8.2.1 Renewable and non-renewable energy resources, 8.2.2 Patterns and trends in energy use, 8.2.3 The national grid, 8.2.4 Step-up and step-down transformers, 8.2.5 Efficiency of the national grid, 8.2.6 Transformers and power transmission at high voltage, 8.2.7 The UK domestic supply, 8.2.8 Direct and alternating potential difference, 8.2.9 Live, neutral and earth wires, and 8.2.10 Dangers of mains electricity. Each one has a worked solution and a mark scheme showing where the marks go.