Generating & distributing electricity (Edexcel GCSE Physics Combined Science): Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
National Grid definition
National Grid definition
System of cables & transformers linking power stations to consumers
National Grid location
National Grid location
Across the UK
Function of transformers
Function of transformers
Change the potential difference
Effect of step-up transformers on P.D.
Effect of step-up transformers on P.D.
Increase potential difference
Where step-up transformers are used
Where step-up transformers are used
From power station to National Grid
Power equation (constant in grid)
Power equation (constant in grid)
Effect on current when P.D. increases
Effect on current when P.D. increases
Current reduces
Why reducing current helps
Why reducing current helps
Results in less energy loss
Effect of step-down transformers on P.D.
Effect of step-down transformers on P.D.
Decrease potential difference
Where step-down transformers are used
Where step-down transformers are used
From National Grid to consumers
Why step-down transformers are essential
Why step-down transformers are essential
For consumer safety
Cause of energy loss in power cables
Cause of energy loss in power cables
Resistance of the wires
When less energy is lost in cables
When less energy is lost in cables
When P.D. is high