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Tutor HuntTest QuestionsPhysics QuestionsYear 10 Physics Questions

 

The National Grid (GCSE Physics)

The following is a GCSE Physics test covering 'The National Grid' from the broader topic Electricity. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

Which of these is a reason the National Grid maintains spinning reserve (online generators running below full output)?
In the context of the National Grid, what is meant by grid “reliability”?
A cable has a resistance of 0.5 O and carries a current of 1000 A. What is the power loss in the cable?
A transformer at a power station steps up the voltage from 25 kV to 400 kV for transmission. What happens to the current in the transmission line (neglecting losses)?
What is meant by the “capacity” of the Grid or a power station?
Which of these is a practical measure to reduce peak demand on the National Grid?
Why are losses from I^2R heating particularly important for long transmission routes?
Which statement about electricity trading and interconnectors between countries is correct?
Which of the following best describes the main purpose of the National Grid in the UK?
Which of the following is a typical measure used by grid operators to ensure supply matches demand in real time?
Why do transmission lines in the National Grid use very high voltages for long-distance power transfer?