(b) Suppose you have a cylindrical wire of radius a, where a parallel-plate capacitor is beingcharged. The gap caused by the capacitor between the wire is an imaginary cylinder withradius a and length d. Current I flows through the wire and charges +Q and -Q accumulateon the parallel plates. [Recall: when charging a capacitor, the energy is stored in the electricfield.]What is the magnetic field in this surface? [Hint: Evaluate at s = a.]

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Answered: (b) Suppose you have a cylindrical wire…

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