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प्रश्न
To which wire of a cable in a power circuit should the metal case of the geyser be connected?
To which wire of a cable in a power circuit should the metal casing of a heater be connected?
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उत्तर
Earth wire (or green wire)
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संबंधित प्रश्न
An electric iron is rated 220V, 2kW.
1) if the iron is used for 2h daily find the cost of running it for one week if it costs 4.25 per kWh
2) Why is the fuse absolutely necessary in a power circuit?
What do you mean by the term local earthing? Explain how it is done.
The metal case of an electric appliance is earthed explain the reason.
- The earthing of an electric appliance is useful only if the fuse is in the live wire. Give the reason.
- Name the part of the appliance which is earthed.
For earthing an electrical appliance, one has to remove the paint from the metallic body of the appliance where the electrical contact is made. Explain the reason.
Why is it necessary to have an earth wire installed in a power circuit, but not in a lighting circuit?
What is meant by earthing of an electrical appliance? Why is it essential?
In a three-pin plug top, one of the pins is thicker and longer than the other two, Give reason. Name this pin.
