Solution to task 316 from Chertov´s for extramural stud

Solution to task 316 from Chertov´s for extramural stud

316. Charge is evenly distributed with linear density τ = 0.2 µC / m over a thin ring with radius R = 20 cm. Determine the strength E of the electric field created by the distributed charge at the point A, located on the axis of the ring at a distance h = 2R from its center.