CBSE : Class X : Science : Chapter 13 : Magnetic Effects of Electrical Current : What are the various rules determining the direction of magnetic field by a current carrying conductor ?

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  • Published date: April 8, 2019
    • Vasai East, Thane, Maharashtra

Ans: The direction of magnetic field by a current carrying conductor can be determined by following rules:


a) Fleming right hand thumb rules: If a straight current carrying conductor is held in the right hand in such a way that the thumb points the direction of the current flowing through it, then the direction of the curved fingers gives the direction of field lines.


b) Maxwell’s Cork Screw Rule: If a right handed cork screw is rotated to advance along the direction of the current through a conductor, then the direction of rotation of the screw gives the direction of the magnetic lines of force around the conductor.

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