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Question

A parallel plate capacitor (Fig. $$8.7)$$ made of circular plates each of radius $$R = 6.0 \mathrm { cm }$$ has a capacitance $$C = 100 \mathrm { pF }.$$ The capacitor is connected to a $$230 V$$ ac supply with a (angular) frequency of $$300 rad s ^ { -1 }$$
(a) What is the $$rms$$ value of the conduction current?
(b) Is the conduction current equal to the displacement current ?
(c) Determine the amplitude of $$\mathbf { B }$$ at a point $$3.0\mathrm { cm }$$ from the axis between the plates.

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