A parallel-plate capacitor has circular plates and no dielectric between the plates. Each plate has a radius equal to 2.3 cm and the plates are separated by 1.1 mm. Charge is flowing onto the upper plate (and off of the lower plate) at a rate of 5.0 A. Show that the magnetic field strength between the plates a distance r from the axis through the centers of both plates is given by B = (1.9 10-3 T/m)r