A thin, 50.0 -cm-long metal bar with mass 75 g rests on, but is not attached to, two metallic supports in a uniform 0.800 T magnetic field, as shown in. A battery and a 10.00 Ω resistor in series are connected to the supports. What is the highest voltage the battery can have without breaking the circuit at the supports? Neglect the resistance of the bar. (Take g = 10 m/s2) 3.8 V 9.4 V 18.8 V 52.5 V 507.0 V