Electricity in the home

Question 1

Single pole double throw

Answer 1

Switch with two different positions

Question 2

SPDT e.g of use is

Answer 2

Control the light at the top of the stairs with a switch at the bottom and a switch at the top

Question 3

Conventional current flows from

Answer 3

Positive terminal to the negative terminal of the power supply

Question 4

Electron flow goes from

Answer 4

The negative terminal to the positive terminal of the power supply

Question 5

Live wire is

Answer 5

Brown

Question 6

Neutral wire is

Answer 6

Blue

Question 7

Earth wire is

Answer 7

Green and yellow stripes

Question 8

The cable joining a device to its 3 pin plug has 3 wires in it..

Answer 8

Live wire, neutral wire and the earth wire

Question 9

The live wire carries current to the

Answer 9

Device

Question 10

The current returns from the device along the

Answer 10

Neutral wire

Question 11

The earth wire carries NO current UNLESS

Answer 11

A fault occurs

Question 12

Switches are ALWAYS placed on the

Answer 12

LIVE side of devices

So that when a device is switched off it is no longer connected to the high voltage mains supply

Question 13

If switches were placed on the neutral side of David’s the the devices would remain…

Answer 13

Live when switched off

Question 14

If a live wire becomes loose and touches the casing. The Earth wire provides

Answer 14

A very low resistance path to earth

Question 15

A circuit breaker (RCD) compares the current flowing in the live wire with that in the

Answer 15

Neutral wire

Question 16

Some wires do not have an earth wire connected to them. Instead they have..

Answer 16

Two layers of insulation between the user and any live wires
1 layer is - on insulation of wires
2- casing of device

Question 17

Electricity is measured in

Answer 17

Kilowatt - hour (kWh)