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The Efficiency of an Electric Motor.
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- Words:
- 5390
- Submitted:
- Tue Jan 06 2004
... The Efficiency of an Electric Motor Aim: To investigate how the efficiency of an electric motor varies when it is lifting different weights. Summary: I have investigated how the efficiency of an electric motor varies when it is lifting different weights. I found that the efficiency of my motor (using an input voltage of 4v) was maximum when it was lifting 500-800g weights. I also found that the efficiency of the motor depended on its internal resistance and friction. I also used my results to estimate the internal resistance of the motor and I found it was about 0.5? In my extension experiment I used the electric motor as a generator. I dropped a variety of weights from my pulley system and I measured the amount of energy produced using a joule meter. I found that the efficiency of the generator increased as the mass of the weight I dropped increased. The
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