Electricity in the Home

Question 1

what is the uk’s mains supplys frequency and voltage?

Answer 1

230 V
at 50 Hz

Question 2

name something that has ac, and smth thathas dc

Answer 2

-uk mains
- cells/batteries

Question 3

What do each of the wires in cables have? (holistically)

Answer 3

core of copper, coloured plastic coating; the colour of the insulation shows its purpose, colours are same for EVERY appliance

Question 4

What are the names of the 3 wire

Answer 4

live wire
neutral wire
earth wire

Question 5

What colour is the live wire?

Answer 5

brown

Question 6

What colour is the neutral wire

Answer 6

blue

Question 7

what colour is the earth wire

Answer 7

green and yellow

Question 8

What does the live wire do? What is its pd?

Answer 8

-provides the alternating potential difference from the mains supply
- 230V

Question 9

What does the neutral wire do? Voltage?

Answer 9

-completes the circuit, current flows through the llive wire and back through the neutral wire
-OV

Question 10

What does the Earth wire do? Voltage?

Answer 10

-protectnig the wiring and for safety - it stops the appliance casing from becoming live
-only carries a current if there is a fault
-0V

Question 11

Explain the dangers of the live wire

Answer 11

electric shock:
- - body is at 0V,
- - if it touches the live wire, a large pd is produced across ur body and a current flows through u
- - causes a large electric shock that can kill u
- - even if the plug socket/light switch is turned off, there is still a pd iin the live wire which, if makes contaxt with ur body, will provide a link between the supply and the eatyh so a current would still flow through you
Fire:
- - any connectio between live and earth can be dangerous
- - if the link creates a low resistane path to earth, a huge current will flow, resulting in a fire