Figure 32.30

Homework 32.7

Fig. 32-30 shows a circular region of radius R = 3.00 cm in which a uniform electric flux is directed out of the page. The total electric flux through the region is given by Φ = (3.00 mV•m/s)t, where t is in seconds. What is the magnitude of the magnetic field at radial distances (a) 2.00 cm and (b) 5.00 cm?