Imagine a water pipe with an impeller (fan) in it to generate electricity.
The water in the pipe is the current (amps).
The water pressure (the force of the water moving) is volts.
The combined power of the current and volts spinning the impeller is the energy (watts).
The diameter of the pipe, which determines the amount of current that can fit in it is the resistance (ohms).
In any electrical circuit, the voltage, resistance, current, and wattage are all interconnected. If you change one, all of the others change as well.
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