How to determine the potential difference?

[cdymdcool]

1. A horizontal rod(oriented in e-w direction) is moved northward at constant velocity through a magnetic field that points straight down.



2. Why is the west end of the rod is at higher potential than the east end?



3. I have no idea how to obtain any information about V.

 

[berkeman]

1. A horizontal rod(oriented in e-w direction) is moved northward at constant velocity through a magnetic field that points straight down.



2. Why is the west end of the rod is at higher potential than the east end?



3. I have no idea how to obtain any information about V.

Show us the equation for the Lorentz force. How can you use it to help you answer this question?