Chapter 4, Problem 4.16P

Referring to Figure 4.23, suppose a conductive bar of length $h=2.0\text{cm}$ moves with velocity $\text{u}=-1.0{\text{a}}_{\text{ρ}}\text{m/s}$ toward an infinite length line of current $I=4.0\text{A}$. Find an expression for the voltage from one end of the bar to the other when $\text{ρ}$ reaches 10 cm and indicate which end is positive.

Figure 4.23 Conductive bar moving toward an infinite length line of current for Problem 4.16.