A conductor anchored to the ground receives electrons that arc to it from a Van de Graaff generator. If the conductor is 0.30 m long and a constant current of 7.0 mA flows through it, what force does it experience from a magnetic field that varies spatially from B = 17.0 (i.hat) T to B = 5.0 (i.hat) T with a uniform drop from the top to the bottom of the conductor?