Posts

The efficiency of an eElectric motor

The efficiency of the motor in experiment 2 does decrease linearly with increasing mass as I predicted. Ideally the two graphs should follow each other since I used the same motor in each experiment. However from my graph you can see that my calculated efficiency for the second experiment is consistently about 9% higher than the calculated efficiency from my first experiment. This difference has probably been caused by the inaccuracy of the joule meter. This is inconsistent with my results from my calibration experiment.
Post a Comment
Read more

Electricity and Magnetism

In my preliminary experiment I learned that I needed a wire which could withstand the weight of at least 1kg, but also would effectively extend enough to see the significant change. I decided to use the wires with a diameter of 0. 31mm and 0. 27mm. I also decided to use at least 1kg of weights because some parts of the wire may not be all the same so they could be thicker and hold more weight or thinner not take that much weight at all. I think the temperature will be almost the same always, so there is no need to worry about it. I will need to repeat the experiment twice for each wire for greater accuracy.
Post a Comment
Read more