Which statement is correct
Magnetic field of current element is perpendicular to position vector
Electric field of point charge is along position vector
Magnetic mono pole physically does not exist
All of above
The magnetic potential at a point on the axial line of a bar magnet of dipole moment $M$ is $V$. What is the magnetic potential due to a bar magnet of dipole moment $\frac{M}{4}$ at the same point
The magnetism of magnet is due to
Below figures $(1)$ and $(2)$ represent lines of force. Which is correct statement
Two small bar magnets are placed in a line with like poles facing each other at a certain distance $d$ apart. If the length of each magnet is negligible as compared to $ d,$ the force between them will be inversely proportional to
The mid points of two small magnetic dipoles of length $d$ in end-on positions, are separated by a distance $x, (x > > d)$. The force between them is proportional to $x^{-n}$ where $n$ is