Magnetic Effects of Current and Magnetism Part 2

A massless square loop, of wire of resistance 10Ω. supporting a mass of I g. hangs vertically with one of its sides in a uniform magnetic field of 103G, 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 =10‌cm,g=10ms−2 )