A massless square loop, of wire of resistance 10 Ω, supporting a mass of 1 g, hangs vertically with one of its sides in a uniform magnetic field of…

A massless square loop, of wire of resistance $\displaystyle 10 \Omega$, supporting a mass of $\displaystyle 1$ g , hangs vertically with one of its sides in a uniform magnetic field of $\displaystyle 10^3 \mathrm{G}$, 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 1g ? (If sides of the loop $\displaystyle =10 \mathrm{~cm}, \mathrm{~g}=10 \mathrm{~ms}^{-2}$ )