A Square loop of side 20 cm and resistance $1\,\,\Omega $ is moved towards right with a constant speed ${v_0}.$ The right arm of the loop is in a uniform magnetic field of $5\,T.$ The field is perpendicular to the plane of the loop and is going into it. The loop is connected to a network of resistors each of value $4\,\,\Omega .$ What should be the value of ${v_0},$ so that a steady current of ${\rm{2}}\,\,{\rm{mA}}$ flows in the loop? <br>