Question

A fuse wire is always connected to the
A. Earth wire
B. neutral wire
C. live wire
D. none of these

Answer 1

Hint: As a first step, we could find what exactly the function of a fuse wire is. Then you could identify the purposes of the given wires in the options and thereby, you could easily determine connecting the fuse with which of them aids the function of the fuse effectively.

Complete Step by step solution:
In the question, we are asked to find which wire is a fuse wire connected.
Before answering the question, we could firstly understand what exactly a fuse wire is and what is its purpose.
A fuse is basically an electrical safety device. They provide protection to an electrical circuit when there is over-current flow. It is basically made of a metal wire that melts down when excess current flows through it thereby stopping the current.
Fuse could be called a self sacrificial device as it blows off when there is too much current in the circuit thereby protecting the circuit by sacrificing itself. But, when this happens it should be replaced soon, for the circuit is now vulnerable in the absence of a fuse in it. Normally the fuses operate in the case of short circuits, overloading, mismatched loads or device failure.
As live wires are the ones that are connected directly to the generators of the electric supply company carrying high voltages of about 220 volts, connecting the fuse wire to them melts itself and thereby preventing the appliance from damage due to the excess current flow.
Therefore, we found that a fuse wire is always connected to the live wire.

Hence, option C is found to be the correct answer.

Note:
If you are wondering why the fuse wires aren’t connected to neutral wires, it is because, even when the fuse melts due to excess current flow, the appliances would still remain connected to high potential points of the power supply through live wire. This creates the risk of electric shock to someone who comes in contact with the appliance. Also, earth wire makes electrical connection with the ground.