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प्रश्न
What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.
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उत्तर
A switch is an electric device that is used to complete or break an electric circuit. If the switch is ‘ON’, then a current can flow through the circuit. However, if the switch is ‘OFF’, then the current cannot flow through the circuit.
Electrical appliances such as table fans, electric lamps, washing machines, juicers and mixers, TV, radio, etc. have switches built into them.
संबंधित प्रश्न
Name the wire in a household electrical circuit to which the switch is connected.
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?
A switch must be connected in the ______.
How should the electric lamps in a house be connected so that the switching ON or OFF in a room has no effect on other lamps in the same building?
What is meant by ‘MCB’? Which part of the domestic electric circuit does it replace?
Why should switches always be connected to the live wire? Give one precaution that should be taken while handling switches.
Would the bulb glow in the circuit shown in Figure?
In which position is the key placed in a circuit?
Why is the switch put in the live wire?
