Fill in the blank
In a household electrical circuit, the appliance are connected in ............with the mains.
Select the correct alternative
The purpose of an electric meter in a house is
- to give the cost of electricity directly
- to give the consumption of electrical energy
- to safeguard the circuit from short circuiting
- to put on or off the mains.
An electric iron of power 1.5 kW is used for 30 minute to press the clothes. Calculate the electrical energy consumed in kilowatt hour