The National Grid (AQA GCSE Physics Combined Science): Quizzes
📚Quizzes
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10 questions from this quiz
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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 is the main function of transformers in the National Grid?
What is the main function of transformers in the National Grid?
They change the potential difference
What do step-up transformers do?
What do step-up transformers do?
Increase the potential difference
Where are step-up transformers used?
Where are step-up transformers used?
From power station to National Grid
If power is constant, what happens to current when potential difference increases?
If power is constant, what happens to current when potential difference increases?
Current decreases
Why does reducing current result in less energy loss?
Why does reducing current result in less energy loss?
Less energy is lost 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?
Resistance of the wires
Why is less energy lost when P.D. is high?
Why is less energy lost when P.D. is high?
High P.D. reduces current, reducing loss