Question

Direction of magnetic field at equatorial point is

• A. parallel to M
• B. perpendicular to M
• C. making an angle of $45^\circ$ with M
• D. antiparallel to M

Answer 1

Answer: (A)

parallel to M

Answer 2

Magnetic field due to a magnet at any point or equatorial line is given by
\hspace15mmB=\frac{\mu_0}{4\pi}\frac{M}{d^3}
Direction of B is shown in figure.

Hence, in equatorial position, the direction of magnetic field is parallel to magnetic axis direction from north pole to south pole ie, parallel to M.