Magnetism and M...

The magnetic susceptibility is negative for

The $$\chi-(\dfrac{1}{T})$$ graph for an alloy of paramagnetic nature is shown in figure. The curie constant is, then

The susceptibility of a diamagnetic material is

The susceptibility of a paramagnetic substance was found for different temperatures and a graph of $$\chi $$ against $$\frac{1}{T}$$ was plotted. From the graph, it was found that what $$\chi =0.5, \frac{1}{T}=5 \times 10^{-3}/K$$. What is the curie constant for the substance ?

A conducting wire frame is placed in a magnetic field which is directed in to the paper. The magnetic field increasing at a constant rate. The directions of induced current in wires AB and CD are:

If the magnetic flux linked up with a coil is changed by 40%, the energy storied in the coil changes by 

The intensity of magnetic field is H and moment of magnet is M. The maximum potential energy is

The mass of a specimen of a ferromagnetic material is  $$0.6 kg$$  and its density is  $$7.8\times 10^{ { 3 } }{ kg }/{ m }^{ { 3 } }.$$  If the area of hysteresis loop of alternating magnetising field of frequency  $$50 { Hz }$$  is  $$0.722{ MKS }$$  units then the hysteresis loss per second will be :-

Mark out the correct options.

Magnetic flux in the circuit containing a coil of resistance 2 ohm changes from 2.0 wb to 10 wb in 0.2 sec. the charge passed through the coil in this time is