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The Right Hand Thumb Rule

Hold the wire carrying current in your right hand so that the thumb points along the wire in the direction of the current, then the fingers will encircle the wire in the direction of the lines of magnetic force.

Maxwell’s right hand thumb rule (corkscrew rule)
Imagine driving a corkscrew in the direction of current then the direction in which we turn its handle is the direction of magnetic field or field lines.


Direction of magnetic field

snow rule:

Direction of Magnetic Field




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