Q. The value of a uniform magnetic field drops to zero from 2 T in 0.01 sec only. Determine the current induced in a circular coil ( of radius 3 cm and of 50 turns ) placed in a plane perpendicular to that magnetic field. [Resistance of the coil is 30 . What is the relation of electrical susceptibility and magnetic permeability with the velocity of light ? Give the range of wave length in Å, of visible light wave.
