The National Grid (OCR GCSE Physics A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the National Grid?
What is the National Grid?
A system of cables and transformers linking power stations to consumers
What do step-up transformers do to potential difference?
What do step-up transformers do to potential difference?
Increase it
Where are step-up transformers used in the National Grid?
Where are step-up transformers used in the National Grid?
Between power station and grid
What happens to current when voltage is increased if power stays constant?
What happens to current when voltage is increased if power stays constant?
Current decreases
Why do step-up transformers reduce energy loss?
Why do step-up transformers reduce energy loss?
They reduce current
What do step-down transformers do to potential difference?
What do step-down transformers do to potential difference?
Decrease it
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?
Wire resistance
When is less energy lost in power cables?
When is less energy lost in power cables?
When voltage is high
What links power stations to consumers?
What links power stations to consumers?
Cables and transformers
What equation relates power, voltage and current?
What equation relates power, voltage and current?
Where are step-down transformers used?
Where are step-down transformers used?
Grid to consumers