Generating & distributing electricity (Edexcel GCSE Physics Combined Science): Quizzes
📚Quizzes
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Practise the questions
10 questions from this quiz
What is the National Grid?
What is the National Grid?
A system of cables and transformers
What do step-up transformers do in the National Grid?
What do step-up transformers do in the National Grid?
Increase the potential difference
Why does increasing P.D. reduce the current in power cables?
Why does increasing P.D. reduce the current in power cables?
Power equals voltage times current
What is the benefit of reducing current in the National Grid cables?
What is the benefit of reducing current in the National Grid cables?
Less energy loss due to resistance
What do step-down transformers do?
What do step-down transformers do?
Decrease the potential difference
Why are step-down transformers essential?
Why are step-down transformers essential?
For consumer safety
What causes energy loss in power cables?
What causes energy loss in power cables?
The resistance of the wires
How is energy loss minimised in the National Grid?
How is energy loss minimised in the National Grid?
Using step-up transformers
When is less energy lost in the power cables?
When is less energy lost in the power cables?
When the P.D. is high
What links power stations to consumers across the UK?
What links power stations to consumers across the UK?
The National Grid