Q25 of 32 Page 101

Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it. Describe some salient features of magnetic lines of field concept.

Due to interaction between the magnetic fields of the compass needle and the magnetic field of bar magnet, a magnetic compass needle shows deflection when a bar magnet is brought close to it.


The various features of magnetic field lines are:


1. The direction of magnetic field lines is from North to South pole.


2. Magnetic field lines are closed curves.


3. The more the lines are closer, the more will be the magnetic field.


4. No two field lines can cross each other.


5. Strength of magnetic field near the poles.


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