EMF Investigation

... th more efficiency. This way, the power supply that maintains the magnetism of the magnet has to be switched on and off rapidly in order to make the current generated worthwhile. Using alternating current of AC power supply normally does it, as it changes direction every so often. Domestic electricity alternates at 50Hz, which means 50 times per second. This process, when compared to the latter, is much more efficient, as not as much energy is lost during the conversion, and the device needed to flicker the current is not as sophisticated as the one needed to move the wire around the field, and it is more easily done.

Evaluation

This experiment has worked well and has finally produced sufficient results that a meaningful conclusion could be deduced from it. The results are more realistically accurate as they have been modified by the Root-Mean-Square Rule, so they are more reliable than if the readings are taken straight from the oscilloscope.

However, the methods used were not in such way that gives the most reliable results. In fact, assistant equipment such as rheostat could be employed for this case to make the variation of current more accurate. The coils were not done in exactly the same way, so the length of the coils inside the magnetic field is not precisely the same in all cases. A mechanical device could be utilized instead of doing it by hand. A doughnut shape magnet could be used instead to prevent the diversion of flux on the corners.

The results, however, are not strictly and totally accurate, as the circuit itself is not 100% efficient. The Transformer Rule only work assuming that the efficiency is 100%, but in fact, there are so many possibilities that energy could be lost. The resistance inside the wires drains up some of the energy, as well as the Eddie-current that occurs inside the magnet itself. Some f ...