the national grid

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state one advantage of sending electricity along overhead wires instead of underground cables.
If there is a problem with one of the wires it can easily be fixed.
1 of 14
state one disadvantage of using overhead wires instead of underground cables.
They don't look very nice.
2 of 14
transformers only work with a.c. what does that mean.
alternating couvent
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Explain why transformers only work with a.c
They only work with a.c. as they need a changing magnetic field.
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Give ONE reason why electricity is sent along the wires at very high voltages.
To reduce energy lost as heat.
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what is the national grid?
It is te system where there are wires and cables to transmit electricity from power stations to the consumers
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what equation involves current, power and voltage.
power= voltage X current
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the input alternating voltage is known as what coil?
primary coil.
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the output alternating voltage is known as what coil?
secondary coil.
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if there are more coils on the secondary coil what transformer is it?
step down transformer
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if there are more coils on the primary coil what transformer is it?
step up transformer
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power is measured in what ?
watts
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current is measured in what?
amps
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voltage is measured in what?
volts
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Other cards in this set

Card 2

Front

state one disadvantage of using overhead wires instead of underground cables.

Back

They don't look very nice.

Card 3

Front

transformers only work with a.c. what does that mean.

Back

Preview of the front of card 3

Card 4

Front

Explain why transformers only work with a.c

Back

Preview of the front of card 4

Card 5

Front

Give ONE reason why electricity is sent along the wires at very high voltages.

Back

Preview of the front of card 5
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