text: help please.? i know how to do the part a, but don't know how to do part b. here is the question: thank you a 15 m long wire having a resistance of 2.0 ohms/m is moved away from you at 10 m/s.  while it is moving it cuts across a magnetic field having a strength of 0.50 n/a.m.  the field is directed downward into the page. a)  the magnitude of the induced emf(voltage) answer: 75v b)  the current in the wire. i'm not big on physics, but i do know basic electronics. assuming your part a is correct (75v):  i=e/r (ohms law)  i = 75v induced onto the wire / 30 ohms (15m x 2 ohms/m)  so 2.5a?