A simple switch can be made by using a small sheet of thermocol, two drawing pins, a safety pin and two pieces of wire. Make a sketch of this switch when it is in ‘off' position.

 Draw the labelled sketch of a torch. Where does a torch get electricity from? Why do we need a switch in the torch?

 How does a fused bulb differ from a normal bulb? Explain the difference between a fused bulb and a normal bulb by drawing their sketches. What happens to the circuit when the bulb in it gets fused? 

 One of the following is needed to run a radio. This is:

Where do we get electricity from?

When electricity passes through a bulb, it gives off: