A ring with a uniform charge `Q` and radius `R`, is placed in the `yz` plane with its centre at the origin

Options

A. the field at the origin is zero
B. The potential at the origin is `k(Q)/(R )`
C. the potential at the origin is `k(Q)/(x^(2))`
D. the filled at the point `(x,0,0)` is `k(Q)/(R^(2)+x^(2))`

Answer

1