A massless square loop, of wire resistance $$10$$ $$\Omega$$, supporting a mass of $$1$$ g, hangs vertically with one of its sides in a uniform magnetic field of $$10^3$$ G, directed outwards in the shaded region. A dc voltage $$V$$ is applied to the loop. For what value of $$V$$, the magnetic force will exactly balance the weight of the supporting mass of $$1$$ g?
(If sides of the loop $$= 10$$ cm, $$g = 10$$ m s$$^{-2}$$)