The earth wire is connected to the outer casing of the appliance because ___________.

The earth wire can prevent the fuse from blowing

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The earth wire can carry leaked charges to the ground

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The outer casing is an insulator and therefore it can store charges

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The earth wire can conduct the heat away from the appliance

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Solution

The correct option is B The earth wire can carry leaked charges to the ground
The earth terminal is connected to the metal casing so that the current goes through the earth wire instead of causing an electric shock. A strong current surges through the earth wire because it has a very low resistance. This breaks the fuse and disconnects the appliance

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Similar questions

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.

Fill in the following blanks with suitable words :

(a) A fuse should always be placed in the ........... wire of a mains circuit.

(b) The earth wire should be connected to the ............ of an appliance.

(a) The earthing of an electric appliance is useful only if the fuse is in the live wire. Give the reason.

(b) Name the part of the appliance which is earthed.

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