Advertisements
Advertisements
Question
Would the bulb glow after completing the circuit shown in Figure if instead of a safety pin we use an eraser?

Advertisements
Solution
Erasers are bad conductors of electricity. They do not conduct electricity. The circuit becomes an open circuit. Hence, the bulb will not glow if a safety pin is replaced with an eraser.
RELATED QUESTIONS
What is the purpose of a switch in a circuit?
A switch is not touched with wet hands while putting it on or off. Give a reason for your answer.
The following diagram shows three lamps and three switches 1, 2 and 3 connected with two cells.
- Name the switch / switches to be closed so as to light all the three lamps.
- How are the lamps connected: in series or in parallel?

It is dangerous to connect the switch in the neutral wire. Explain your answer.
What are ‘dual switches’? Mention their one main use.
In which position is the key placed in a circuit?
Name the component of a circuit which help us to start or stop the appliances & safely and easily.
Name the component which connects electrical components to one another.
What precaution do you take while handling a switch?
Name the wire to which a switch is connected.
