what is magnetic field lines
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A pictorial representation of magnetic field lines is very useful in visualising the strength of the magnetic field.The direction of magnetic field lines is defined to be the direction in which the North end of a compass needle points,the magnetic field is traditionally called the B-field.
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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.
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