List of top Physics Questions on Magnetism and matter asked in COMEDK UGET

A metal rod of susceptibility \(799\) is subjected to a magnetising field of \(2000\,\text{A m}^{-1}\). The permeability of the material of the rod is: (Given \(\mu_0 = 4\pi \times 10^{-7}\,\text{T m A}^{-1}\))

A short bar magnet placed with its axis at \(45^\circ\) with an external field of \(400 \times 10^{-4}\,\text{T}\) experiences a torque of \(0.024\,\text{Nm}\). If a solenoid of cross-sectional area \(10^{-4}\,\text{m}^2\) and \(500\) turns replaces the short bar magnet such that they have the same magnetic moment, then the current flowing through the solenoid is:

For a short magnet, the magnetic field on the axial line at a distance 10 cm from its centre is \( 1.6 \times 10^{-7} \, T \). What is the magnetic field on its equatorial line at the same distance 10 cm from its centre?