a) The SPH3U1 Build a Motor project presented some interesting and challenging problems. One key difficulty was getting the power necessary to create electromagnets. I found that AA, AAA, D, C, 9 volt and 6 volt batteries failed to produce a strong and steady current to allow the electromagnets to create a strong magnetic field. Another problem I found was that most of the wire I originally used had high resistance and would require a large amount of power to work. I found that there was also a certain technique to barring the ends of the coil so that the circuit could be completed. My electromagnet could have also been stronger which would have allowed for a faster stronger motor.
b) Difficulties such as generating enough power were solved by using a small transformer I had at home. It produced about 12 volts in a steady current which allowed my motor to work. I then used the more powerful transformers at school to get the best result. I overcame the high resistant wire problem by going to the Source by Circuit City and purchasing some magnetic wire and I found some copper wire in my garage. The technique to barring the ends of the coil is rather simple now all you have to do is bare one end entirely and the bare half the other end of the coil. As for making my electromagnet stronger I simply added more coils to increase its strength.
c) SEE GRAPH PAPER
2. If we assume that the speed of the motor is proportional to the magnetic field strength of the electromagnets there are a number of ways to increase the speed of the motor. First off thought the factors affecting the speed of the motor is the size of the coil, amount of current that can pass through the wires without burning them, the amount of resistance of the wires, the strength of the electromagnetic and many other factors. One easy way to make the motor run faster is to add more magnets. With my model you could have one electromagnetic above and another below... [continues]
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