Topic 2b - domestic electricity ( 1. electricity in the home )

Question 1

what are the 2 types of electricity supplies

Answer 1

ac (alternating current)

dc (direct current)

Question 2

what is ac

Answer 2

in ac supplies the current is constantly changing directing. these currents are produced by alternating voltages.

Question 3

what is dc

Answer 3

direct supply is the supply batteries and cells use. direct current is always flowing in the same direction.

Question 4

what are the 3 wires inside a three core cable

Answer 4

earth wire
live wire
neutral wire

Question 5

what is the colour of the live wire

Answer 5

brown

Question 6

what is the colour of the neutral wire

Answer 6

blue

Question 7

what is the colour of the earth wire

Answer 7

green and yellow

Question 8

voltage the live wire is at

Answer 8

230V

Question 9

voltage neutral wire is at

Answer 9

0V

Question 10

purpose for earth wire

Answer 10

it also has 0v it is for protecting the wiring for safety, stops the appliance casing from becoming live.

Question 11

why can a live wire be dangerous

Answer 11

our bodies are at 0V as there is no current flowing through us. if a large pd flows through you it causes a big shock which could injure or kill you.