Question

The magnetic field in a given region is uniform. Draw a diagram to represent it.

Answer 1

Hint: When magnitude as well as direction of magnetic field intensity is the same at all the points in the magnetic field is called a Uniform magnetic field. Magnetic field lines can be represented by magnetic lines of force. Lines in uniform magnetic fields must be straight and equidistance.

Complete step by step answer:

The space around a magnet where its magnetic effect is experienced is called the magnetic field. The magnetic field is schematically presented in diagram by magnetic lines of force which are called as the lines of magnetic induction. Arrows in the diagram show the direction of magnetic lines. The lines of induction are collectively called the flux. It is assumed that the line of induction emerged from the North Pole and terminated at the South Pole outside the magnet. The concentration of lines of induction represents the field strength. The concentration of magnetic field which is the number of flux lines passing through the unit area of cross section perpendicular to its direction is called magnetic flux density denoted as B.
When magnitude as well as direction of magnetic field intensity is the same at all the points in the magnetic field then it is called uniform magnetic field. It is represented by a set of equidistant parallel straight lines. Lines of force have a tendency to exert a lateral pressure on each other. This property explains the repulsion between like charges. Magnetic lines of force are crowded in a region where magnetic intensity is larger and magnetic lines of force are widely separated from each other in a region where magnetic intensity is small. In a uniform magnetic field, magnetic lines of force are parallel to each other and equally spaced.

Additional Information: Consider a bar magnet, a greater force of attraction is exhibited at the two ends of a bar magnet. The two ends are known as magnetic poles. One is called the North Pole and the other is the South Pole. These poles always occur in pairs and cannot be isolated. It means if you cut the magnet then again an individual magnet will again have two poles.

Note: The lines of force are purely geometrical construction which help us to visualize the nature of the magnetic field in a region they have no physical existence. Lines of force either intersect or do not meet each other. The lines of force do not pass through the conductor. The magnetic field inside the conductor is always zero but they pass through the insulator.