Question

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

Answer 1

A uniform magnetic field is one that has the same strength and direction at all points. It is represented by a set of parallel lines that are equally spaced apart. The direction of the magnetic field lines points in the same direction as a north-south pole of a magnet points.

Complete step by step answer:

The strength density of magnetic fields in a region is depicted by the space between the magnetic field lines. In a non-uniform magnetic field, the lines may be parallel but in some regions, they are more closely placed than in other regions, portraying the difference in magnetic field density. The force experienced by any object placed in a uniform magnetic field is the same at all points in the field.
There are various ways to create a uniform magnetic field; if the opposite poles of a bar magnet are brought very close, then a uniform magnetic field exists in that gap. Also, if current is made to flow through a relatively long cylindrical coil, a uniform magnetic field exists all along the inside of the coil.
Also, a perfectly uniform magnetic field is a theoretical concept.

Note: There’s a significant amount of confusion in the direction of magnetic field lines (whether they go from north to south or the other way around). If our region itself is the source of the magnetic field, then the field lines go from south to north but if our region simply lies between the poles of another magnetic object, the field lines traverse from the north to the south pole.