An electrician assembling a household circuit uses a long thick copper wire with green insulation and a short wire made up of copper-tin alloy. What are the two wires called? Mention the importance of each wire in an electric circuit.How are the two wires connected in the circuit?

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Solution

The copper wire with a green insulation is conventionally called an Earth Wire.
An earth wire is connected to the metal casing of an appliance and provides a safe path to the excess current as it travels into the ground.

The short wire made of copper-tin alloy is known as a Fuse Wire.
A fuse wire is connected to a household supply and prevents appliance from being by passage of heavy currents. It acts as circuit breaker and thus prevent the flow of current.

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Similar questions

In the domestic electric circuits, the red coloured insulated copper wire is called

(a) Name the three connecting wires used in a household circuit.

(b) Which of the two wires mentioned in part (a) are at the same potential?

Write true or false for each statement:

(a) A fuse wire has a high melting point.

(b) Flow of protons constitutes electric current.

(d) S.I. unit and commercial unit of electrical energy are same.

(e) Overloading of electric current in circuits can lead to short circuiting.

(f) Our body can pass electricity through it.

(g) The metallic cases of all appliances are insulators of electricity.

(h) The earth wire protects us from an electric shock.

(i) A switch should not be touched with wet hands.

(j) All electrical appliances in a household circuit work at the same voltage.

(k) In a cable,the green wire is the live wire.

(l) A fuse is connected to the live wire.

(m) A switch is connected to the neutral wire.

Of the three connecting wires in a household circuit, two of the three wires are at the same potential. They are:

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