Question

A parallel-plate capacitor is formed by two discs with a uniform poorly conducting medium between them. The capacitor was initially charged and then disconnected from a voltage source. Neglecting the edge effects, show that there is no magnetic field between capacitor plates.

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Solution

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Here also we see that neglecting edge effects, . Thus Maxwell's equations reduced to, div
A general solution of this equation is can be thought of as an extraneous magnetic field. If it is zero, .

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