If a diamagnetic substance is brought near south or north pole of a bar magnet it is a. Attracted by the poles b. Repelled by the polesc. Attracted by north pole and repelled by south pole d. Attra...
Answer is B.
Why the perpendicular components of the field on axis is not considered in the calculation of net magnetic field?
The perpendicular component of the magnetic field due to the upper half of the coil is cancelled due to the field produced by the lower half of the coil as both are equal in magnitude and opposite in direction.
Hence, the perpendicular components of the field on the axis are not considered in the calculation of net magnetic field.