Solution to task 315 from Chertov´s for extramural stud

Solution to task 315 from Chertov´s for extramural stud

315. An infinite thin rod, limited on one side, carries a uniformly distributed charge with a linear density τ = 0.5 µC / m. Determine the strength E of the electric field created by the distributed charge at the point A, lying on the axis of the rod at a distance a = 20 cm from its beginning.