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Suppose that a parallel-plate capacitor has circular plates with radius R = 33 mm and a plate separation of 5.7 mm. Suppose also that a sinusoidal potential difference with a maximum value of 130 V and a frequency of 64 Hz is applied across the plates; that is, V= (130 V) sin[2at(64 Hz)t]. Find Bmax(R), the maximum value of the induced magnetic field that occurs at r = R. Number i Units The induced magnetic field at radial distance 6.6 mm from the central axis of a circular parallel-plate capacitor is 2.9 x 10-6 T. The plates have radius 3.3 mm. At what rate is the magnitude of the electric field between the plates changing? Number i Units At what rate must the potential difference between the plates of a parallel-plate capacitor with a 2.1 UF capacitance be changed to produce a displacement current of 1.6 A? Number Units