Magnetism and M...

A long magnet moves with constant velocity along the axis of a fixed metal ring. It starts from a large distance from the ring, passes through the ring and then moves away far from the ring. The current in the ring is plotted against time. Which of the following best represents the resulting curve?

If the angular momentum of an electron of mass $$m$$ is $$J$$ then the magnitude of the magnetic moment will be

A magnetising force of $$360 Am^{-1}$$ produces a magnetic flux density of $$0.6 T$$ in a ferromagnetic material. The susceptibility of the material is: 

An electron beam is moving near to a conducting loop then the induced current in the loop:-

If two straight current carrying wires are kept perpendicular to each other almost touching, then the wires

Copper is :

In a long hollow vertical metal pipe a magnet is dropped. During its fall, the acceleration of magnet

The wing span of an aeroplane is 20 meter. it is flying in a field.where the vertical component of magnetic field of earth is $$ 5 \times 10^-5 $$ tesla with velocity $$ 360mh^1 $$. The potential difference product between the blades is:

A bar magnet of moment $$2$$ $$A-m^2$$ is free to rotate about a Vertical axis passing through its centre. The magnet is released form rest from east west direction. The $$K.E.$$ of the magnet as it takes north-south direction is ($$B_H = $$25$$X  10^{-6}T$$)

A current is flowing through a thin cylindrical shell of radius R. If the energy density in the medium, due to the magnetic field, at a distance r from the axis of the shell is equal to U then which of the following graphs is correct?