Posted by Amber on Tuesday, October 5, 2010 at 10:43am.
Assuming voltage and current are in phase,
effective resistance=110/7.50
Your teacher's use of resistance is really poor. Work is being done on the fluid in the compressor, not being done on resistance. When a motor turns, power is used in not resistance heating, but in delivering a mechanical work to some device. Resistance is a poor term to describe as the electrical load.
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