Hey guys, I just for the life of me can't figure out how to find the Voltage across A to B. I found the equivalent resistance, but I have no freaking clue how to get the Vab...
yes you can but it sounds like you haven't foggiest what you're doing. taking shortcuts is not what you should be doing.
do a full nodal analysis and then keep doing it until you're no longer a pleb
I can do the KVL and KCL...
What's really tripping me up is the look of the circuit. I've looked all over and I can't find a system that resembles this one. Why are A and B just sticking out, I keep thinking its an incomplete circuit.
Ok I used Kirkoffs Voltage law to sum up the voltages in the circuit. The voltage drops across the resistors are given by Ohm's law U=r*i and the r*i part is used in the equation. The two 4k resistors have an equavalent resistor of 2k Ohm so after calculating the current, i, to 0.0012A the voltage across A and B could be calculated using Ohm's law to 2.4 V
This matches my initial result which I "calculated" by saying "ok so the voltage source pushes with 12 volts this way and the other is pushing with 6 volts the otherway so 6 volt must be pushed clockwise around in the loop. And those two 4k resistors are just a 2k resistor and if we add together the 1k and 2k resisters, since they are in series, then we have a simple voltage divider and then the voltage across A and B is 2.4 volt"
OP you dont have to do all kinds of fancy cicuit analysis on every ciruit but you need to develop your gut feeling so you know when you have to KVL and KCL or logic