The maximum electric field at a point on the axis of uniformly charged ring is Eo. At how many points on the axis will the magnitude of electric field be Eo /2

Dear Student
There will be two such points . The electric field at center of ring is 0. Then it increases to E. So it has to pass through 1 E/2. Then at very large distance E is 0 , so it has to pass through E/2 . Hope you got it.