Monday, February 1, 2016

Motors

Copper is not magnetic and we use it because we can start it and stop it by applying a electric current if we were to use a iron we could use it and have no need to create a magnetic field around it because it is already magnetic but once we start it we could never stop. The motors we made are built using a battery a neo demian magnet and a copper wire, the motor work because when you put together the circuit the copper wire gets magnetised and if you have it just right a perfect balance between touching the magnet and not getting a lot of friction the motor will start going because the magnet is pushing the copper wire forward every time it has the chance to this makes it spin.

Electromagnestism

Pre activity:
During the pre activity i noticed that once I had a complete circuit and I waved the cable on top of the compass the compass started pointing with the cable I thought this was weird and I wanted to see if the battery worked as well so I tried it and it worked.
I think this is because the battery acts like a magnet because it has a north + and a south -
and when you connect the wire the battery passes all of the magnetic properties to the wire.

Main Activity: 
During the main activity I learned a big thing about magnets it is that they are reactive to to electricity so it is not that the battery is a magnet is that the magnet is responsive to electricity. When you make a circuit the wire gets a magnetic field and that can  magnetise the nail. When I wrapped the nail 10 times it did not pick up a single paper clip and the same for 15 wraps and 20 wraps until I finally got it to pick up a paper clip after wrapping it 30 times.

Rube Goldberg Machine (If the Videos don't work open them in youtube)