quiz 13

Question 1

Why is it dangerous for the live wire to touch the neutral or earth wire?

Answer 1

Short circuit, low resistance, high current, fire

Question 2

Describe the role of a fuse in a circuit.

Answer 2

It melts and breaks the circuit if the current is above a certain value

Question 3

What surrounds the outside of wires in household electrical goods?

Answer 3

Electrical insulation

Question 4

What is the role of the neutral wire?

Answer 4

completes the circuit

Question 5

What are the 3 wires in a three-core cable?

Answer 5

Live, neutral and earth

Question 6

What is the potential difference of the earth wire?

Answer 6

0 V

Question 7

Which wire in a three-core cable has green and yellow stripes?

Answer 7

Earth

Question 8

What colour is the live wire in a three-core cable?

Answer 8

Brown

Question 9

State 2 risks of electricity.

Answer 9

Electrocution and fire

Question 10

What is the potential difference between the neutral wire and earth?

Answer 10

0 V

Question 11

Which wire in a three-core cable is the fuse connected to?

Answer 11

Live

Question 12

Why is it dangerous to touch a live wire, even when the circuit is off?

Answer 12

Electrocution

Question 13

Define power.

Answer 13

Energy transferred per second

Question 14

What is the potential difference between the live wire and earth?

Answer 14

230 V

Question 15

Which wire in a three-core cable is brown?

Answer 15

Live

Question 16

Which wire in a three-core cable is blue?

Answer 16

Neutral

Question 17

What is the role of the earth wire?

Answer 17

safety wire to stop the appliance becoming live

Question 18

What colour is the earth wire in a three-core cable?

Answer 18

Green and yellow stripes

Question 19

What is the role of the live wire?

Answer 19

carries the alternating potential difference from the supply

Question 20

What colour is the neutral wire in a three-core cable?

Answer 20

blue