Question

The diagram in figure shows a three-pin socket marked as 1, 2 and 3. To which wire is the fuse connected?

A. 3
B. 2
C. 1
D. 1 and 3

Answer 1

As the very first step, you should identify the given holes on the socket that are marked. Also, recall the significance of each hole. Then think of the function of an electric fuse and thus identify the pin to which it should be connected in order to carry out its function of safeguarding the circuit.

Complete step by step solution:
In the question, we are given a three pin socket marked 1, 2 and 3. We are asked to find the pin at which the fuse is connected. In order to answer this question, we have to first identify the three pins that are marked.
There are basically three wires that form the integral part of electric connection. They are live wire, neutral wire and the earth wire. Through the neutral wire, the electric current just routes out, that is, this could be called the route that the current takes while exiting an appliance and hence they have a voltage that is known to be close to zero.
The hole that is marked 1 is the earth pin. This is of great help when the live wire comes in contact with the casing by taking the current through it. The hole marked 2 is the neutral pin and that marked three is the live pin.
The fuse is connected to the live wire as doing so breaks the circuit in order to protect other appliances by melting down.

Note: The fuse is that electrical device that provides safety to an electronic circuit when there is an excess current flow. Each fuse will have a fuse rating above which the fuse will melt by itself and thus break the circuit. Due to this very behavior it is called a self sacrificial device. It should also be replaced very soon after being burst out.