The voltage of alternating current, a.c., is ___________ before it is transmitted through the National Grid Network.

The voltage of the alternating current is highest at the

The _______ enables electricity to be transmitted to the branch substation when needed

2-pin plugs are not connected to the earth wire.

Mei Ling got an electric shock while ironing her clothes. The following information shows the steps taken by his brother to help her.

P- Calls an ambulance

Q- Remove electrical source using an insulator

R- Switches off the main power supply

S- Perform mouth to mouth resuscitation if the victim is not breathing.

Which sequence is correct?

Choose the step-up transformer

_______ carries electric current to an electrical appliances.

_______ returns electric current to the branch substation.

_______ connects an electrical appliances directly to the Earth.

___________ disconnects the current supply temporarily when it is not needed (such as during repairing damaged wiring).

___________ cuts off the current supply in the house when excessive current flows through it.

___________ measures the electrical energy that is used in the house.

___________ separates the final circuit into the other parts of electrical equipment like air conditioner circuit and controls the quantity of current flows through it.

What is the colour of earth wire?

The main supply of electrical energy in a house has a voltage of

Electricity is supplied to homes in the form of

There are two types of fuse. The wire of _____________ cannot be replaced when melted. A new fuse need to be replaced instead.

If an electrical appliance uses current of 11 A, which is the suitable value of fuse to be used.

Choose the safety components found in wiring system at home.