Question

Draw the pattern of the magnetic field lines for the two parallel straight conductors carrying current of the same magnitude ‘I’ in opposite directions, as shown. Show the direction of the magnetic field at a point O, which is equidistant from the two conductors. (Consider that the conductors are inserted normal to the plane of a rectangular cardboard.)

Answer 1

Using the right-hand thumb rule:

At O, the total of the two circular magnetic fields is directed downward.