Lag1989 problem number 12.16

Lag1989 problem number 12.16

The potential of the field on the axis of a ring of radius R, uniformly charged with a linear density of τ, has the form φ = τ * R / 2ε (R² x²); where x is the distance from the plane of the ring to the point. Find the field strength vector E on the axis of the ring E.

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