Friday, 26 June 2015

Make the World’s Simplest Electric Train

Ever wondered how electric train works? Do you know it is easier to make it than preparing a burger!!


Here we will show you how To Make the World’s Simplest Electric Train! This “Train” is made of magnet,copper wire and a dry cell. Grab the kids and watch this simple science experiment!


Here is what is happening:

The battery and magnets are resting on the coil, allowing current to flow in a small coil section, which creates a magnetic field. His magnets are oriented in such a way that the front of the train adds to the field and the back of the train opposes the field.

For example, at 0:20, you can see that the battery’s positive terminal is pointing to the right, and the coil is a right-hand helix, the current will create a field pointing left. If we want the train to go left, then we want the “front” of the train to be in the same direction as the coil field and the “back” of the train to oppose the coil field. In other words, he placed the magnets with Norths facing outwards. For this configuration, the train will always travel in the direction of the negative terminal of the battery. If we wanted the train to travel in the direction of the positive terminal, we’d need to put the Souths pointing outwards.

If the coil was a left-handed helix, it would be the opposite (would travel in the direction of the positive battery terminals when Norths are facing outwards).