Write the energy transformations which take place in an electric bulb (or electric lamp).

Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt hours.

Describe the energy changes which take place in a radio.

Name five appliances or machines which use an electric motor.

A bulb lights up when connected to a battery. State the energy change which takes place:

(i) In the battery.

(ii) In the bulb.