What are magnetic field lines how is the direction of magnetic field lines at a point determined?
Answers
The magnetic field is unique at every point in space. Magnetic field lines are continuous and unbroken, forming closed loops. Magnetic field lines are defined to begin on the north pole of a magnet and terminate on the south pole.
To determine the magnetic field lines at a point, keep a magnetic compass at that point. The direction in which the needle of the Compass points is the Direction of Magnetic Field at that point, which can be represented by drawing a tangent to that point.
The magnetic field can be defined as:
“A region around/surrounded by a moving electric charge or a magnetic material within which the force of magnetism acts.”
How does Magnetic Field occur?
If you are wondering how Magnetic fields occur. Well, it occurs whenever a charge is in motion. That being said if you apply more charge in the motion the strength of a magnetic field usually increases. Besides, Magnetism and magnetic fields are part of the electromagnetic force which is indeed one of the four prime forces of nature.