In a long cylindrical wire of radius R, magnetic induction varies with the distance from axis as `B = cr^(alpha)`. Find the function of current density in wire with the distance from axis of wire.

A cylindrical wire of radius R has current density varying with distance r form its axis as J(x)=J_0(1-(r^2)/(R^2)) . The total current through the wire is

The magnetic field strength of a current-carrying wire at a particular distance from axis of the wire

Consider a long cylindrical wire carrying current along the axis of wire. The current distributed non-uniformly on cross section. The magnetic field B inside the wire varies with distance r from the axis as B=kr^(4) where k is a cosntant. The current density J varies with distance r as J=cr^(n) then the value of n is (where c is another constant).

An infinitely long cylinderical wire of radius R is carrying a current with current density j=alphar^(3) (where alpha is constant and r is the distance from the axis of the wire). If the magnetic fixed at r=(R)/(2) is B_(1) and at r=2R is B_(2) then the ratio (B_(2))/(B_(1)) is

A long, cylindrical wire of radius b carries a current i distributed uniformly over its cross section. Find the magnitude of the magnetic field at a point inside the wire at a distance a from the axis.

The magnetic induction at a distance r from a straight, infinitely long wire in air and carrying a current I is given by

What is the magnetic induction at a distance of 5 cm from a straight wire carrying a current of 5 mA ?