A non-conducting ring of radius \(0.5\ m\) carries a total charge of \(1.11\times10^{-10}C\) distributed non-uniformly on its circumference producing on its circumference on electric field \(E\), everywhere in space. The value of line integral \(∫_{l=∞}^{l=0} (-E×dl)\) (\(l=0\) being centre of ring) in volts is