Find the current density as a funciton of distance `r` from the axis of a radially symmetrical parallel stream of electrons if the magentic induction inside the strems varies as `B = br^(2)`, wheree `b and `alpha` are positive contans.

Find the current density as a funciton of distance r from the axis of a radially symmetrical parallel stream of electrons if the magnetic induction inside the streams varies as B = br^(alpha) , where b and alpha are positive constants.

Find the current density as a function of distances r from the axis of a radially symmetrical parallel stream of electrons if the magnetic induction inside the steam varies as B=br^a , where b and a are positive constants.

The current density in a wire of radius a varies with radial distance r as J=(J_0r^2)/a , where J_0 is a constant. Choose the incorrect statement.

A unifrom current of density f flows inside an infinite plate of thickness 2d parallel to its surface . Find the magentic induction induced by this current as a funcition of the distance x from the median palane of the plate. The magnitude permeability is assumed to be equal to unity both inside and outside the plates.

Figure shows a cylinderical wire diameter a, carrying a current I. The current density which is in the direction of the central axis of the wire varies linearly with radias distance V from the axis according to the relation J = J_0r//a . Obtain the magnetic field B inside the wire at a distance r' from its centre.

The variation of radial probability density R^2 (r) as a function of distance r of the electron from the nucleus for 3p orbital: