1. Consider a cylindrical volume With circular cross section, consisting of a uniform volume charge density p. The cylindrical length is L, and the radius of its cross section is a. The cylinder rotates around its axis with angular frequency 9. Assuming that the axis of the cylinder is along the z axis in a Cartesian system of coordinates, and that it is permeated by a uniform and constant magnetic field B Boy, derive an expression for the torque N that it experiences