Suppose that a parallel-plate capacitor has circular plates with radius R = 26 mm and a plate separation of 5.3 mm. Supp

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Suppose that a parallel-plate capacitor has circular plates with
radius R = 26 mm and a plate
separation of 5.3 mm. Suppose also that a sinusoidal
potential difference with a maximum value of 160 V and a
frequency of 82 Hz is applied across the plates; that
is,

V = (160 V) sin[2π(82 Hz)t].

Find Bmax(R), the maximum value
of the induced magnetic field that occurs
at r = R.