In this lesson, we will learn:

- Moving a conductor in a uniform magnetic field results in an induced emf across the conductor.
- How to find the magnitude of the electromotive force?
- How to find the direction of the electromotive force?

__Notes:__- Moving a conductor in a uniform magnetic field results in an induced emf across the conductor.
- As the conductor moves, there is a change in magnetic flux, due to the change in area of the conductor that is exposed to the magnetic field lines.
- Change in flux results in electromotive force induction and induced emf in the loop.
- According to Faraday’s law:

**Magnitude of the Electromotive Force**

$l$ = length of the rod

$B$ = magnetic field

$v$ = speed of the rod

$A$ = area of the loop

If the rod moves at speed of $v$, it travels a distance of $\Delta x$, in a time $\Delta t$;

Therefore, the area of the loop changes by an amount of $\Delta A$ = $l \Delta x$

**Direction of the Induced Current and Electromotive Force**

- The direction of the induced current is in a way to oppose the change in flux.