A magnetic compass needle is placed in a plane of paper near point A as shown in 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 condition is the deflection maximum and why?
The straight current carrying conductor should be placed in the plane of the paper. The deflection of the compass is maxi¬mum when the conductor
passes through A and perpendicular to the plane of the paper. The magnetic field due to current carrying conductor is maximum in the plane of the