Which one of the following statements is not true ?

(a) In a house circuit, lamps are used in parallel.

(b) Switches, fuses adn circuit breakes should be placed in the neutral wire

(c) An electric iron has its earth wire connected to the metal case to prevent the user receiving a shock

(d) When connecting a three-core cable to a 13 A three-pin plug, the red wire goes to the live pin.

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Solution

(b) switches, fuses and citcuit breakers are always placed in live wire because if they are connected to neutral wire, then the live wire will always be connected to the appliance and person may get a shock.

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Similar questions

A power circuit uses a cable having three different wires.

(a) Name the three wires of the cable.

(b) Between which of the two wires should the heating element of an electric geyser be connected?

(d) To which wire should the switch and fuse be connected?

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.

A

An appliance has three wires of colours red, black and green, and is connected to a three pin plug. The thickest pin is connected to which wire?

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