If there is no flow of current in the circuit, which can be the suitable reason from the following?

Broken wire in the circuit

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Molten fuse wire

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Closed switch

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Properly connected wires

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Open in App

Solution

The correct options are
A
Broken wire in the circuit

B
Molten fuse wire

An open circuit is one where the continuity has been broken by an interruption in the path for electrons to flow. This will happen if the wire is snapped somewhere in between or the fuse at the main circuit board is fused or melted. It will not allow the current to complete the circuit. This is also known as an open circuit i.e. no flow of current in the circuit.

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(a) A fuse is a short piece of wire of high ___ and of the material of low ___.

(b) A fuse wire is made of an alloy of ___ and ___ if the current in a circuit exceeds the current rating of the fuse wire, it ___.

(d) Higher the current rating, ___ is the fuse wire.

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(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.

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(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.

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