No, it is the same. DC stands for direct current rather than AC, which is alternating current.
With an appropriately rated DC to DC converter.
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can ou step down 36 volts dc to 12 volt dc using batteries
No. The value and polarity are different.
With an invertor/rectifier or voltage multiplier.
Use a properly rated potentiometer.
120 volt single phase rectifies to about 96 volt DC
batteries are only used for DC CIRCUTS. if the motor is a DC MOTOR you can.
All Batteries are DC or Direct Current.
AC voltage is more sufficient than DC voltage. Moreover, an AC transformer can be developed but DC voltage will make it harder. Without a transformer, we cannot turn the high and low voltaged into each-other.
No. You need 12 volt AC to run a 12 volt AC motor, not 12 volt DC.
This DC voltage variation is typically used in controllers; zero (o) is stop and 13 Volts is maximum. More typical is zero to 5 volt or zero to 10 volt DC control.