Computer Forums Resistors help

 10-06-2009, 10:33 AM #1 Daemon Poster   Join Date: May 2009 Posts: 690 Resistors help I am Teaching myself Basic Electronics and need some help with Resistors. I know that if there are say 3 Resistors and say they are 5 Ohm 10 Ohm 10 Ohm In series you just ad them one at a time to get 25 Ohm Total. You have a 25 Ohm Total because they all are one right after the next and they ad up as so. But this is what I need help with and please try to keep it as simple as you can? What if you still have the same Resistors but they are now Parallel one side by side. 5 Ohm 10 Ohm 10 Ohm Now I do know that this is were you need to have some kind of Voltage because every Resistor will be letting a diferant amount of Voltage through. So say you have 30 Volts Battery. We know that the 5 Ohm Resistor will be letting more Voltage go through it then the 10 Ohm Resistors. So do we Divide 30 Volts by the 3 Resistors we have or what?????? Thanks __________________ __________________
 10-06-2009, 10:45 AM #2 Golden Master     Join Date: Apr 2009 Location: USA Posts: 5,438 Re: Resistors help ok, are you wanting to know how to find out the voltage of each resister, in parallel? or what the total resistance is in parallel? for total resistance in parallel-- take the rating for each resister, divide it by 1 (to get reciprocal), then add them together, then divide it by 1 again, to get a whole number. 5, 10, 10 (in parallel) = 2.5Ohms. http://physics.bu.edu/py106/notes/Circuits.html (better explained here)♠ a good description of the Voltage drop on resistors is also there. __________________ You got to have a Fiddle in the band!