Generating & distributing electricity (Edexcel GCSE Physics): Flashcards
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Practise the cards
10 cards from this deck
What is the National Grid?
What is the National Grid?
System of cables & transformers linking power stations to consumers
What does the National Grid transfer?
What does the National Grid transfer?
Electrical power from power stations to consumers
Function of transformers
Function of transformers
Change the potential difference
What step-up transformers do to P.D.
What step-up transformers do to P.D.
Increase P.D.
Effect of increasing P.D. on current
Effect of increasing P.D. on current
Reduces the current (as )
Why reducing current helps transmission
Why reducing current helps transmission
Less energy loss due to resistance
What step-down transformers do to P.D.
What step-down transformers do to P.D.
Decrease P.D.
Why step-down transformers are needed
Why step-down transformers are needed
Essential for consumer safety
Cause of energy loss in power cables
Cause of energy loss in power cables
Resistance of the wires
When is less energy lost in cables?
When is less energy lost in cables?
When P.D. is high