Maxwell's Equation A circular-plates capacitor of radius R = 22.0 cm is connected to a source of emf E= Emsinωt, where E

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Maxwell's Equation
A circular-plates capacitor of radius R = 22.0 cm is connected
to a source of
emf E= Emsinωt, where Em = 237V and ω = 180rad/s. The maximum
value
of the displacement current is id = 4.5μA.
(a) Find the maximum value of the current i in the circuit.
(b) Find the maximum value of dφE /dt, where φE is the electric
flux through the
region between the plates.
(c) Find the separation d between the plates.
(d) Find the maximum value of the magnitude of ~B between the
plates at a distance
r = 10.7 cm from the center.