In a parallel plate capacitor, two plates are being discharged by a constant current. Each plate has a radius of 4.00 cm. During the discharging, at a point between the plates at radial distance 2.00 cm from the central axis, the magnetic field has a magnitude of 14.0 nT.
(a) What is the magnitude of the magnetic field at radius 6.10 cm?
(b) What is the current in the wires attached to the plates?