# A non conducting ring of radius 0.5 m has charge of $1.11 \times 10^{-10}C$ distributed non-uniformly on its circumference. An electrical field is spread everywhere in space. The value of the potential at the center of the ring is ( approximately )
$\begin {array} {1 1} (1)\;Zero & \quad (2)\;1\: V \\ (3)\;2\: V & \quad (4)\;4\: V \end {array}$