Electricity In The Home

Question 1

alternatecurrent

Answer 1

continuous change if direction of current

Question 2

direct current

Answer 2

constant value as current flows from positive to negative

Question 3

live wire

Answer 3

carry alternate voltage, 230V, from supply to circuit

Question 4

neutral wire

Answer 4

complete circuit, 0V

Question 5

earth wire

Answer 5

carries current to earth for when circuit is fault, 0V

Question 6

fuse

Answer 6

provides low resistance path to earth for when current is too high, prevents electrocution

Question 7

efficient components

Answer 7

copper wires, brass, rubber around wires, plastic

Question 8

Charge

Answer 8

How much current flows within a period of time

Question 9

Power stations

Answer 9

Generate heat then convert thermal energy to electrical energy

Question 10

Nation grid step by step

Answer 10

Station > step-up transformer > pylon > step-down transformer

Question 11

Why do step-up transformers increase voltage to 400k?

Answer 11

To transmit high power without needing high current, avoiding energy loss to surroundings via heat

Question 12

Pylon

Answer 12

Transmit

Question 13

Why do step-down transformers decrease voltage to 230v?

Answer 13

So towns are not in danger, and appliances are not blown apart