Electricity

Question 0

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Answer 0

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        Neutral

Question 1

The electricity supplied to our homes is called…

Answer 1

Mains supply

Question 2

Earth wire

Answer 2

Green and yellow

Question 3

Live wire

Answer 3

Brown

Question 4

Neutral

Answer 4

Blue wire

Question 5

Hazards of electricity

Answer 5

Frayed cables 
Long cables
Damaged plugs
Water around sockets 
Pushing metal objects into sockets

Question 6

Earth wire is the

Answer 6

Metal body of an appliance is connected to Earth by the Earth wire which conducts any charge straight into the ground

Question 7

Fuse

Answer 7

A fuse is a length of wire designed to melt and so breaking a circuit when the current is passing through it goes above a certain level.

Question 8

The thicker the fuse wire …

Answer 8

The greater is the current required to cause it to melt

Question 9

A circuit breaker is a device that …

Answer 9

Breaks a circuit when the current goes above a certain value and can be reset easily

Question 10

Double insulation

Answer 10

Some appliances have no Earth wire because they have an outer plastic case

Question 11

Insulation

Answer 11

Metal wires are good conductors of electricity
Plastics or rubber coating acts as insulators
Insulators are materials which do not allow electricity to flow through them easily

Question 12

Live wire

Answer 12

Goes alternately - and + as electrons are pushed and pulled around the circuit

Question 13

Neutral wire

Answer 13

Is earthed by the electricity board. It is connected to a metal plate buried in the ground
The voltage is 0 if you touch the neutral wire you should not get a shock

Question 14

The switch

Answer 14

On the mains socket is fitted in the live wire.