Quote:
Originally posted by ECUPirate
Question: the comair is rated at 24v, and draws .75A. Does this mean it is a 32ohm resistor? Therefore, at 12v, it draws .375A. Now, if you add a 25 ohm resistor to the circuit, how much voltage is flowing through the fan? Or does the resistor just let less current through? What make the fan slow down!?? Use numbers in your answer..  (i'm such an accountant.)
|
A resistor does not alter voltage. It resists current (amps). Voltage drops occur when you apply KVL and calculate the voltages over every component. But strictly speaking, resistors only resist current. Diodes drop voltage. An ideal drops voltage between .6 and .7 volts.
And to clarify your situation up there, when you split up a line like you did with that 12v line, all the branching lines still have 12v. The only thing that changes is the current.