Advertisements
Advertisements
Question
What is meant by ‘MCB’? Which part of the domestic electric circuit does it replace?
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.
APPEARS IN
RELATED QUESTIONS
Name the wire in a household electrical circuit to which the switch is connected
It is dangerous to connect the switch in the neutral wire. Explain your answer.
What is a switch? State its function in an electric circuit.
What are ‘dual switches’? Mention their one main use.
Complete the drawing shown in Figure to indicate where the free ends of the two wires should be joined to make the bulb glow.
Would the bulb glow in the circuit shown in Figure?
Name the component of a circuit which help us to start or stop the appliances & safely and easily.
In the circuit shown in Fig. 12.3, 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.
What precaution do you take while handling a switch?
