The National Grid (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards
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12 cards from this deck
National Grid definition
National Grid definition
System of cables & transformers linking power stations to consumers
Purpose of National Grid
Purpose of National Grid
Transfer electrical power from power stations to consumers
What transformers do
What transformers do
Change the potential difference
Step-up transformer effect on P.D.
Step-up transformer effect on P.D.
Increase potential difference
Where step-up transformers used
Where step-up transformers used
From power station to National Grid
Why step-up transformers used
Why step-up transformers used
High P.D. reduces current, so less energy lost in wires
Step-down transformer effect on P.D.
Step-down transformer effect on P.D.
Decrease potential difference
Where step-down transformers used
Where step-down transformers used
From National Grid to consumers
Why step-down transformers needed
Why step-down transformers needed
For consumer safety
Cause of energy loss in power cables
Cause of energy loss in power cables
Resistance of the wires
Is energy always lost in power cables?
Is energy always lost in power cables?
Yes, always (due to resistance)