Generating & distributing electricity (Edexcel GCSE Physics): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
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Practise the questions
11 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 to potential difference?
What do step-up transformers do to potential difference?
Increase it
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?
Resistance of the wires
When voltage increases, what happens to current if power stays constant?
When voltage increases, what happens to current if power stays constant?
Current decreases
Why does reducing current result in less energy loss?
Why does reducing current result in less energy loss?
Less loss due to resistance in wires
Why are step-up transformers used in the National Grid?
Why are step-up transformers used in the National Grid?
Less energy lost when P.D. is high
What do transformers change?
What do transformers change?
Potential difference
Where do step-up transformers increase the P.D.?
Where do step-up transformers increase the P.D.?
From power station to National Grid
What condition about P.D. minimises energy loss in transmission?
What condition about P.D. minimises energy loss in transmission?
High P.D.