Electricity in the home

1

What type of current does a mobile phone battery produce?

2

What is the size of mains voltage Northern Ireland?

3

What colour is the live wire?

4

Which wire is connected to the fuse?

5

What is the position of the neutral wire in a plug?

6

What is the purpose of the earth wire?

7

What is the purpose of a fuse?

8

Use the following electricity meter readings to calculate the cost of electricity used by a school.

Previous reading = 37170 kWh.

Present reading = 41217 kWh.

Units at 14.78 p per kWh.

9

What is the cost of using a 3 kW heater for 9 hours if the price of a unit is 15 p?

10

A microwave has a power rating of 800 W. What size fuse should be used in the plug if the mains voltage is 240 V.