Question

A L shaped conductor with sides of 0.01 m is travelling through a uniform magnetic field of 100 mT with a velocity of 1 ms^-1. What is the emf induced at the two ends of the conductor?

Answer 1

The magnetic field is everywhere but I am too lazy to draw so many x.

Answer 2

find the motional emf in the leg that is travelling perpendicular to its length

Answer 3

Let's consider an electron inside the conductor. SInce the conductor is moving inside a magnetic field, the Lorenz force is acting on our electron, and that force will displace the electron toward an end of our conductor. So after a time t all free electrons are collected to the same end of our conductor. In other words, and internal electric field, inside the conductor is created, and that internal electric field E, prevents other free electron to move itself. In order to taht the Lorentz force, acting on an electron, has to be balanced by the electric force:
\[\Large evB = eE\]
Please keep in mind that relationship holds, if magnetic field and velocity of the conductor, are two vectors perpendicular each other.

Answer 4

oops...Lorentz*