(29-35) A short section of wire, of length a, is moving with velocity v, parallel to a very long wir

(29-35) A short section of wire, of length a, is moving with velocity v, parallel to a very long wire carrying a current I as shown in Fig. 29-45. The near end of the wire section is a distance b from the long wire. Assuming the vertical wire is very long compared to a+b, determine the emf between the ends of the short section. Assume v is (a) in the same direction as I, (b) in the opposite direction to I.