To operate a filament bulb or an electric fan, we can use a bell switch.
False
It is false. We cannot use a bell switch or which is also known as a pressure switch, as it works on the simple principle of when the pressure is applied the circuit is ON, when pressure is removed, the circuit is OFF. It is an instant type of switch. But, for a fan and a bulb we need a switch which is either remains ON or OFF at a time. So, the bell switch is not useful to operate a fan or a bulb.