Advertisements
Advertisements
Question
What is meant by ‘MCB’? Which part of the domestic electric circuit does it replace?
Advertisements
Solution
‘MCB’ stands for ‘miniature circuit breaker’. This is a device that automatically ‘switches off the mains supply if the current drawn Exceeds the prescribed upper safe limit. It can be ‘reset’ with the help of a flip-over switch. It protects the entire circuit and appliances against short circuiting, etc.
RELATED QUESTIONS
What is the purpose of a switch in a circuit?
It is dangerous to connect the switch in the neutral wire. Explain your answer.
A switch must be connected in the ______.
What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.
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.
In the circuit shown in the following figure, when the switch is moved to ‘ON’ position,
You are provided with a bulb, a cell, a switch and some connecting wires. Draw a diagram to show the connections between them to make the bulb glow.
Why is the switch put in the live wire?
Name the wire to which a switch is connected.
