Electric Train
Electricity and Magnetism
Level
2
When a battery with magnets on both ends is placed in a copper coil, why does it move?
Moving magnets cause a current which attracts the battery
The coil must be connected to external voltage
The battery causes a current which attracts the magnets
The battery levitates inside the copper coil
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
When the ends of the magnets touch the coil, then the circuit is completed and current flows. This creates a magnetic field inside the coil which attracts the magnets. The magnets must be aligned in the same order for this set up to work so that the force on both the magnets are in the same direction.