A long copper wire of 8.00 m consists of a cross-sectional area of 1.00 x 10-4 m2. This wire makes a one turn loop in the shape of a square and is then joined to a battery which exerts a potential difference of 0.300 V. When the loop is positioned in a uniform magnetic field of magnitude 0.400 T, determine the maximum torque which can act on it? The resistivity of copper is 1.7 x 10-8 m.