The of an appliance is the amount of electrical energy it turns to other forms of energy every second. Power can be worked out using the equation Power = voltage × .

It is important to have the correct in a plug. This is because a fault might take a bigger than normal current, but not to blow the 13 A fuse. This might up the appliance and may cause it to catch fire.

You work out the from the power equation. Then you choose the value of fuse up. If you chose too low a value, the fuse might keep on blowing. If a fuse for no apparent reason, there may be a fault in the appliance and it would be wise to get it checked.

Current is a flow of . If a current of 1 A flows for 1 s, a charge of 1 has flowed.

The energy transferred can be found out by multiplying the charge by the .