Two identical short bar magnets are placed at $120^{\circ}$ as shown in the figure. The magnetic moment of each magnet is $M$. Then the magnetic field at the point $P$ on the angle bisector is given by
$\frac{\mu_0}{4 \pi} \cdot \frac{M}{d^3}$
$\frac{\mu_0}{4 \pi} \cdot \frac{2 M}{d^3}$
$\frac{\mu_0}{4 \pi} \cdot \frac{2 \sqrt{2} M}{d^3}$
$0$
Magnetic lines of force due to a bar magnet do not intersect because
The earth’s magnetic field at the equator is approximately $0.4 \;G$. Estimate the earth’s dipole moment.
Calculate the axial field of a finite solenoid.
A permanent magnet
A bar magnet is placed north-south with its north pole due north. The points of zero magnetic field will be in which direction from the centre of the magnet