Also does rpm of generator affect output voltage or current or frequency or all ?
My guess is No. Both can be used to generate current. From my understanding generators produce electricity which can be used to run DC and AC motors. Once you have the running electric motor it would be a waste to use it to produce electricity. The motors are used to produce mechanical energy, which can do things like make a car move. I would guess that rpm affects the voltage. The current would increase as well with rpm but, it depends on the amount of load on the motor and if the load is varying. And frequency would increase as well since the rpm is a unit for frequency.
