INDUCED CURRENT in COIL ANIMATION

Inducing a current to flow in a coil using a moving bar magnet is dependent on the speed of movement and the polarity of the magnet. This is a difficult concept, so this PowerPoint is designed to explain it by animating the process.

There are slides with N pole moving slowly and moving fast towards and away from the coil and for the S pole moving slowly and moving fast towards and away from the coil.
You need to click on the arrow to make the magnet and its surrounding magnetic field move.
It demonstrates that:

• induced current only flows when the magnet moves
• the size of the induced current is bigger if the magnet moves faster
• the direction of the induced current depends on the polarity and direction of movement of the magnet.

The animation shows how the induced current flows around the coil to produce a polarity which will mean that work has to be done to move the magnet.
When an induced current flows, the polarity of the end of the coil nearest the magnet determines the direction of current flow. A letter N or a letter S, where the ends point in the same direction as the current, is shown