question_answer

  Draw the pattern of field lines due to magnetic  field  associated  with  a current-carrying straight conductor. State how the magnetic field produced changes with (a) an increase in current in the conductor. (b) the distance from the conductor.

Answer:

                  The pattern of field lines due to magnetic field associated with a current-carrying straight conductor is given below                (a) When current increases, strength of magnetic field increases.                                (1) (b) When distance from the conductor increases, strength of magnetic field decreases.                                                         (1)