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## What is the electric field on the axis of a ring?

Electric Field on the Axis of a Ring of Charge

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.

## Where electric field is maximum?

The maximum of the electric field is always at the border between the p- and the n-type region, since there (and only there) all charges of one kind add up to the maximum possible value.

## What is electric field equation?

The electric field E is defined to be E=Fq E = F q , where F is the Coulomb or electrostatic force exerted on a small positive test charge q. … The magnitude of the electric field E created by a point charge Q is E=k|Q|r2 E = k | Q | r 2 , where r is the distance from Q.

## What is electric field inside a circle?

To find the electric field in the X direction we can integrate around the whole circle. • What we find is that since electric field is proportional to the inverse square of the distance away, the smaller closer charge on the blue part of the circle cancels out with the larger but more distant green part of the circle.