Assume there is a circuit with a battery, and the wires connected to it are suspending a bar with mass = 0.2kg and length = 0.5m (negligible electrical resistance). The wires are so fragile that they don't apply any force on the far. A static magnetic field of 1.7T is pointing into the page. The resistor in the circuit is 6, and the gravity points downward. Calculate the magnitude of emf to be supplied from the battery if the bar is not moving.