Answer a, b, and c please

A long, straight, solid cylinder, oriented with its axis in the z- (a) Show that To is the total current passing through the entire cross section of the wire. direction, carries a current whose current density is J . The current density, although symmetrical about the cylinder axis, Essay answers are limited to about 500 words (3800 characters maximum, including spaces). is not constant but varies according to the relationship 3800 Character(s) remaining J - 210 1 - (2)2 k fort Sa =0 for r > a where a is the radius of the cylinder, r is the radial distance from the cylinder axis, and To is a constant having units of amperes. Submit Request Answer Part B Using Ampere's law, derive an expression for the magnitude of the magnetic field B in the region r > a. Express your answer in terms of the variables , a, r, and appropriate constants (/4 and 7). AED hoe ? B: Submit Request Answer Part C Obtain an expression for the current / contained in a circular cross section of radius r