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Question

Under what condition, the electric field between the plates of a parallel plate capacitor is uniform?

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Solution

Electric field lines between the two charged plates areparallel and equally spaced , except near the edges . In thecentral region , the electric field has the same magnitude at allpoints and we can write E = constant between two closelyspaced parallel plates

Parallel plate capacitor is formed by two plates of area A andthe plates are separated by a distance d . We assume d is smallcompared to the dimensios of each plate so that the electric fieldE is uniform between them. and we can ignore fringing (lines of Enot being straight) at the edges

E=aϵ0


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