Question

In an electrical circuit, a fuse is connected.
A. In the live wire.
B. In the neutral wire
C. In the earth wire
D. Any of these

Answer 1

Hint: A fuse is a device that is used to protect electrical appliances and circuits from damage. Its work is to detect any kind of short circuit and stop the flow of current from that circuit.

Complete answer:
We know that a fuse has a thin wire of high resistance and low melting point and it is generally constructed of copper, zinc, aluminum, silver or an alloy to provide the characteristics needed by the fuse.

Let us see option A: In the live wire
A live wire is the wire through which current passes at first while entering the circuit and the appliance, so the live wire has a potential difference and current also passes from the live wire so a fuse can be connected with the live wire.
So option A is correct.

Considering option B: In the neutral wire
Through a neutral wire current flow while exiting the circuit, or the appliance so it does not have a potential difference and if we connect a fuse with neutral wire it is impossible to save any valuable electric appliance as the current has already passed through half of the circuit and the appliance. So a fuse cannot be connected with a neutral wire.
So, option B is incorrect.

Considering option C: In the earth wire
A earth wire is generally given to save an electrical appliance from short circuit current. It is done so that if the fuse does not melt with the short circuit current then the excess current will pass through the earth wire and will be neutralized but if a fuse is placed there then it will break the circuit and as a result the circuit and the appliance both will be damaged.
This option is incorrect.

Considering option D: Any of these.
This option is incorrect.

So, the correct answer is “Option A”.

Note:
We must note that the fuse will only work if it is placed at the right place in the circuit. The live wire is the perfect place as it has a very high potential of magnitude 220 Volt and in the other case the neutral wire has zero potential so it is not a feasible area to place a fuse there.