Originally posted by Turion
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Please show me how your theory works on this example.
A 12 volt battery is connected to a motor with 2 wires, one from the positive battery terminal to a motor terminal and the other wire from battery negative to the other motor terminal. A simple circuit. Two components, a source (battery) and a load (motor). The motor has a fan attached to its shaft which presents a mechanical load to the motor. Say it spins at 2000 RPM and draws 10 amperes from the battery.
Analysis: Battery voltage = 12V, battery current = 10A. Battery power = 120W. If the circuit runs for 20 seconds, then 2400J of energy are removed from the battery.
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