CBSE Class 10 Answered

<div>Why are magnetic field lines of a bar magnet always curved?</div> <div> </div> <div> </div>

Asked by Bhumika k | 26 Jul, 2016, 08:57: PM

Expert Answer

The space around a magnet in which the force of attraction and repulsion due to the magnet can be detected is called the magnetic field.
Magnetic lines of force are continous in naure which represent the region under the magnetic influence.
If a magnetic needle is placed in magnetic field of a bar magnet, it alligns itself in a definite direction. If the needle is displaced in the field, the direction of the needle continously changes. The path along whch the needle moves is a curved path which starts from the North pole and ends at the South pole of the bar magnet.This curved pat is called the magnetic field lines of force.
It is one of the property of magnetic field lines that inside the magnet, the direction of field lines is from its south pole to its north pole.
If we consider one line of force, then the strength of the magnetic field is same at all points on that magnetic field line. Also, a magnet does not have a monople. Its has two poles - North and South.
Thus, the only possible path traced by the magnetic field lines so satisfy the above consitions is by having closed curves.

Answered by Yashvanti Jain | 27 Jul, 2016, 02:21: PM