Consider the coaxial conductor shown in Fig. 3. Assume the current I flows in opposite directions in the inner and outer conductor respectively. You can assume the current is uniformly distributed in the inner and outer conductors.
(a) Use Ampere's law to determine the magnetic field B within the inner conductor, between the conductors, and outside the outer conductor. Make a plot of B as a function of displacement from the center of the coax cable.
(b) Considering the Lorentz force on moving charge in a magnetic field, sketch the direction of forces acting on points along the circumference of the inner and outer conductor where current is flowing.
