Question

electric field due to a ring at axis​

Answer 1

Explanation:

This gives the predicted result. Note that for x much larger than a (the radius of the ring), this reduces to a simple Coulomb field. This must happen since the ring looks like a point as we go far away from it. Also, as was the case for the gravitational field, this field has extrema at x = +/-a.

Answer 2

Explanation:

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