Magnetic induction is a
Scalar quantity
Vector quantity
Both $ (a)$ and $ (b)$
None of the above
Give the explanation of Gauss’s law for magnetic field.
Two like magnetic poles of strength $ 10$ and $40$ $ SI$ units are separated by a distance $30 \,cm$. The intensity of magnetic field is zero on the line joining them
Two lines of force due to a bar magnet
A bar magnet of magnetic moment $10^4\,J/T$ is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of $4×10^{-5}\, T$ to a direction $ 60° $ from the field will be.....$ J$
The direction of line of magnetic field of bar magnet is