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Electric Current(I)

Along with li...

Question

Along with live wire and neutral wire, a third wire is also used in domestic electric wiring. What name is given to this third wire?

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Solution

Along with live wire and neutral wire, a third wire is also used in domestic electric wiring. This third wire is called earth wire.

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Q. What are the role of live wire and neutral wire in domestic purpose

Q. In an electric iron being used in a household, the plastic insulation of live wire and neutral wire in the connecting cable gets torn. Due to this, naked live wire touches the naked neutral wire directly and the electric fuse of the circuit blows off.
(a) What term is used to indicate the touching of naked live wire and neutral wire directly?
(b) When the naked wires touch each other directly, what happens to the resistance of the circuit so formed?
(c) What happens to the current flowing through the wires under these conditions?
(d) Which wire connected to the body of an electric iron protects the person using this electric iron from electric shock?

Q. Why is a fuse wire used in domestic electrical circuits despite the presence of an earthing wire?

The main fuse is connected in :

(a) live wire

(b) neutral wire

(c) both the live and earth wires

(d) both the earth and neutral wires.

Q. If there are 3 wires connected to a plug having 3 pins namely live wire,neutral wire and earth wire...... Then how much wires are connected in 2 pin plug?????is any of the wire missing...

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