The National Grid (OCR GCSE Physics A, Combined (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
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 does the National Grid transfer?
What does the National Grid transfer?
Electrical power from stations to consumers
What is the function of transformers in the National Grid?
What is the function of transformers in the National Grid?
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 and voltage increases, what happens to current?
If power is constant and voltage increases, what happens to current?
Current decreases
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 high P.D. used in the National Grid?
Why is high P.D. used in the National Grid?
Less energy is lost in the cables