As shown in the figure, a conducting rod with a linear mass density of 0.0420 kg/m is suspended by two flexible wires of negligible mass in a uniform magnetic field directed out of the page. A power supply is used to send a current through the rod such that the tension in the support wires is zero. Power supply B' (a) If the magnitude of the magnetic field is 3.41 T, determine the current in the conducting rod. A (b) Determine the direction of the current in the conducting rod. O to the left O to the right