question_answer

The direction of magnetic lines of force produced by passing a direct current in a conductor is given by :

A)  Lenzs law

B)  Flemings left hand rule

C)  Right hand palm rule

D)  Maxwells law

Correct Answer: D

Solution :

                 Maxwells right handed screw rule states that if we hold the screw driver in the right hand and rotate it such that the screw moves in the direction of current in the conductor, then the diretion of rotation of the thumb will be the direction of magnetic lines of force. Hence, Maxwells law gives the direction of magnetic lines of force produced by passing a direct current in a conductor.