Question

Ques. 13 A magnetic compass needle is placed in the plane of paper near point A as shown in the figure. In which plane should a straight current carrying conductor be placed so that it passes through A and there is no change in the "deflection of the compass? Under what conditions is the deflection maximum and why?​

Answer 1

Answer:

If there is to be no change in the deflection of the compass, the magnetic field due to current-carrying conductor should be perpendicular to the plane of the paper. For this, the conductor should lie in the plane of the paper.