What is the electric field at a centrally located point P above a uniformly charged disk of radius R?

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Charlie Hooper eNotes educator| Certified Educator

Lets say point P is a distance z above the central axis of the disk. We will integrate concentric rings of charge, with thickness dr, from the center of the disk to the edge. From symmetry, all components of the electric field will cancel except for in the upwards direction.

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