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