A wire of a diameter a and has a current I
1. If I is distributed so that J is proportional to the distance from the axis, find J in terms of I.
2. If I is distributed so that J is inversely proportional to the distance from the axis, find J.
Let us assume radius of conductor = R
Hence, pi*R^2 = a (given)
=> R = sqrt(a/pi)
Assume J(r) = k*r
Where k =constant, r = distance from the ...
If current density is function of distance from the axis, it's value in terms of total current through the conductor is estimated.