Question

At which part of the magnet is its magnetic force maximum?
A: At the Poles
B: At the centre
C: Between the centre and the poles
D: None of these

Answer 1

Hint: Strength of magnetic force is directly proportional to the strength of magnetic field at that point and strength of magnetic field depends upon line density of magnetic force of lines at that point so to determine strength of magnetic force we have to know line density of magnetic force of lines at that point.

Complete step by step answer:

Initially we have to know what a magnetic field is. The magnetic field is a region where there is an influence of a magnet.

Magnetic field lines are imaginary lines around the magnet.

Strength of magnetic field at a particular point depends upon line density of magnetic force of lines at that point which means magnetic force of lines are crowded then magnetic field at that point is strong and vice versa.

Since all the magnetic field lines are generated from the poles of the magnet and the density of magnetic field lines depends upon the distance from the pole. As the distance from the pole increases, the density of magnetic force of lines decreases.

                                  The magnetic field is represented by the magnetic field lines



Hence magnetic force of lines are more crowded at the poles compared to the centre of magnet and hence strength of magnetic field at north and south pole magnet is more compared to centre of magnet.

And therefore magnetic force is maximum at both the poles of the magnet compared to the centre of magnet.

So correct option is: (A)

Additional Information:
The magnetic field is an abstract entity that describes the influence of magnetic forces in a region. Magnetic field lines are a visual tool used to represent magnetic fields. They describe the direction of the magnetic force at any given position.

The properties of magnetic lines of force are as follows.

A. Magnetic field lines emerge from the north pole and merge at the south pole.
B. As the distance between the poles increases, the density of magnetic lines decreases.
C. The direction of field lines inside the magnet is from the South Pole to the North Pole.
D. Magnetic lines do not intersect with each other.
E. The strength of the magnetic lines is the same throughout and is proportional to how close the lines are.

Note: Students have to learn how to draw the magnetic force of lines so they can try it using compass and pencil on a paper. Depending upon the type of magnets magnetic field lines also will vary.