INDUCED CURRENT in a COIL ANIMATION

This PowerPoint shows how a current is induced to flow in a coil using a bar magnet. It shows how the magnetic field surrounding the bar magnet cuts the coil.
By clicking on an arrow you can make the bar magnet move towards and away from a coil.
An ammeter needle shows how the direction and size of the induced current changes as the N pole of the bar magnet is moved towards and away slowly and quickly and also as the S pole of the magnet is moved towards and away slowly and quickly.
Importantly, current only flows when the bar magnet is moving.
The final slide explains that the induced current always flows in a direction to oppose the change that produced it, which is Lenz’s Law and that work has to be done in order to overcome this opposition and is transformed into electrical energy. If this did not happen it would violate the Principle of Conservation of energy.