Transmission of Electricity GCSE Revision Quiz | Two Thirty Volts

GCSE Revision Quiz: Transmission Age: 14-16 Year Olds

Question 1

Electricity is distributed from power stations through...?

Power cables.
Ducts.
Microwaves.

Question 2

The electricity distributed through power cables mainly looses energy....?

Because of leakage of the current.
As heat because of the resistance of the cables.
As sound because of the crackling noise of overhead cables.

Question 3

The power loss in a power cable...?

Is equal to the current times the resistance of the cable.
Is equal to the current times the square of the resistance of the cable.
Is equal to the square of the current times the resistance of the cable.

Question 4

For a cable of resistance 0.1 Ohms and carrying a current of 10 Amps the power loss will be...?

10 Watt
0.01 Watt
100 Watt

Question 5

The resistance of a given length of power cable can be reduced by ...?

Reducing the thickness of the cable.
Increasing the thickness of the cable.
Heating the cable.

Question 6

Significantly increasing the thickness of the power cable is not practical because...?

The cable would cost too much.
It cannot be made thick enough.
The cables would be too heavy.

Question 7

The alternative to reducing resistance to reduce energy loss from the power cables is... ?

Increasing the current.
Reducing the current.
Increasing the resistance.

Question 8

Transformers are used in power distribution to reduce energy loss by...?

Reducing current through increasing voltage.
Providing greater insulation.
Reducing the resistance of the cable.

Question 9

Electricity is distributed around the country through the ...?

National Cable system.
National Grid system.
Local Cable system.

Question 10

The maximum voltage used by the National Grid for long distance power transmission is...?

275kv.
33kV.
400kV.

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