Question

Is it possible to isolate the poles of a magnet?
$\left( a \right)$ Yes
$\left( b \right)$ No
$\left( c \right)$ May be
$\left( d \right)$ Can’t say

Answer 1

Hint – In this question think of the concept that magnetic lines of forces form a closed loop in case of a magnet and are straightened inside the magnet. So if we isolate the poles then continuous loop behavior of a magnet will be affected and thus the magnet will lose its magnetic or magnetizing properties. Thus this will help commenting on the given problem statement.

Step-By-Step answer:
As we all know that the magnetic field of lines always forms a closed loop i.e. if it originates from one of the poles it always goes back from the other pole just like an electric current, an electric current always forms a closed loop otherwise it will not flow.
But this is not in the case of magnetic field lines.
Such as if we have a voltage source and we did not connect a load then electric current will not flow.
But if we have a bar magnet, it always has a north and south-pole so there is always a magnetic field of lines coming from one end going back from the other end.
It is an imaginary field of lines as we cannot see these lines from the naked eyes.
So suppose we cut this bar magnet into two pieces, doing this these two pieces behave like two separate magnets having individual north and south-poles.
So these two pieces of bar magnet have their individual magnetic field of lines which form a closed loop.
So it is not possible to isolate the poles of a magnet (i.e. one single pole or we can say monopole)
So this is the required answer.
Hence option (B) is the correct answer.

Note – The diagrammatic representation of the magnetic field lines of a magnet is shown in figure.

Image above shows the magnetic field lines of a simple magnet. From the North Pole they point towards the South Pole. The magnetic field lines, however, do not necessarily stop at the edge of the magnet. They travel through it so that the magnetic field points from the southern pole to the North Pole within the magnet.