Every question from past board papers on Para-, dia- and ferromagnetism, effect of temperature, newest paper first. Open any question for its full worked answer.
Match List-I with List-II.
List-I (Material): A. Diamagnetic; B. Ferromagnetic; C. Paramagnetic; D. Non-magnetic
List-II (Susceptibility (\(\chi\))): I. \(\chi=0\); II. \(0>\chi\ge-1\); III. \(\chi\gg1\); IV. \(0<\chi<\epsilon\) (a small positive number)
Choose the correct answer from the options given below:
An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m\(^{-1}\). The permeability of the material of the rod is :
(\(\mu_0 = 4\pi\times10^{-7}\) T m A\(^{-1}\))
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from
The magnetic susceptibility is negative for :
