The National Grid (AQA GCSE Physics Combined Science): Flashcards
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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 across the UK
Transformer function
Transformer function
Change the potential difference
Step-up transformer effect
Step-up transformer effect
Increases potential difference
Step-up transformer location
Step-up transformer location
From power station to National Grid
Power formula
Power formula
Effect of increasing voltage (constant power)
Effect of increasing voltage (constant power)
Current reduces
Benefit of high voltage transmission
Benefit of high voltage transmission
Less energy loss due to resistance
Step-down transformer effect
Step-down transformer effect
Decreases potential difference
Step-down transformer location
Step-down transformer location
From National Grid to consumers
Why step-down transformers used
Why step-down transformers used
Consumer safety
Cause of energy loss in power cables
Cause of energy loss in power cables
Resistance of the wires
When energy is lost in power cables
When energy is lost in power cables
Always
Why high P.D. reduces energy loss
Why high P.D. reduces energy loss
Lower current means less energy lost to resistance