At the start of class we recapped on what the magnetic field of a magnet looked like and Mason also asked us to find different ways to demagnetize a magnet. Professor Mason also added that the reason why the magnet has that type of magnetic field is because of the structure within the magnet. Using that knowledge we chose to change the shape of the magnet because the structure would change and therefore the magnetic field would not exist anymore. Temperature could also alter the magnet's magnetic filed because a change in temperature also changes the structure of the magnet but slowly.
After talking about how a magnet worked, we reviewed a little of the previous magnetic field concept acting on a closed circuit. We examined how the force would work and what it related to. We used our previous definition of torque and using the force we were able to get the torque of a magnetic field which was equal to half the length squared of the current times the magnetic field times the sine of the angle between them. Using that knowledge we were able to solve our problem using the concept we just learned.
Next we were asked to created our own motor using magnets and allowing the motor to run for a long period of time. The picture of the apparatus is shown below.
We tried different scenarios by switching the positive and negative side when powering the magnetic motor. We found that it spins counterclockwise when the positive is on the north side and clockwise when the negative is on the same side.
Lastly, we applied magnetic torque to a sphere and solved a problem and we also tied the idea of current but using a different definition to magnetism and after that Mason showed us an experiment on how compasses behaved when a magnetic field was present.
Overall, we learned more about magnetic fields and the concepts behind torque and we went more in depth regarding magnetism.
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