Question

The figure shows the magnetic field lines in a magnetic field. A, B and C are three points in this field. At what point is the magnetic field minimum?

Answer 1

Hint: The magnetic field is an area or space around the magnet in which there is an influence of a magnet. There are different types of magnets; they are bar magnets, rod magnets, horseshoe magnet, ring magnet etc. All types of magnets have two poles; the North Pole that is denoted by ‘N’ and the South Pole that is denoted by ‘S’.

Complete step-by-step solution:
The closed curves which are continuous in a magnetic field are called magnetic lines of force. The curved lines are used for the representation of a magnetic field that is drawn such that the number of lines relates to the magnetic field's strength at the given point and the tangent of any curve at a specified point is along the direction of magnetic force at that point.
The magnetic lines of force are uniform and strong at the point C and they diverge as they towards points A and B and the distance between the lines increases. At this given point, when we consider points A and B, the magnetic lines of force at B seem to be more divergent than A. The strength of the magnetic field is weaker at B where the lines are in long distance and they strengthen as closeness increases.
Therefore, the magnetic field is minimum at point B compared to A and C.

Note: To understand the topic magnetic field better, place an iron nail in a particular distance from the magnet. Suddenly it gets attracted towards the magnet. If the iron nail and the magnet are in long distance, it will not have any influence. The area whose power of magnet exists is called the magnetic field.