Chapter 29 Problem 35

Problem

A short section of wire, of length $a$, is moving with velocity ${\vec {v}}$ , parallel to a very long wire carrying a current $I$. 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 ${\vec {v}}$ is

(a) in the same direction as $I$,

(b) in the opposite direction to $I$.