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# (didnt know which thread) Did I solve this easy circuit problem right? - Page 2

Ahh, reminds me of last semester/three weeks ago. Feels good being a freshman in Electrical and Computer Engineering…

Shouldn’t it be 2V? The parallel resistors are an equivalent 2 Ohm resistance, bringing the total to 6 Ohms. By V=IR, that’s 1A of current in the circuit. 1A x 4 Ohms = 4V drop across the first resistor, leaving a potential of 2V between the second node and the node after the parallel resistors.

Then again, it’s late and I’m extremely tired. I may be making a stupid mistake.
Hmm...sounds like a problem for nodal analysis. When you said no internal resistance, it reminded me of physics class. (PH 213)

[(V_x - 6) / 4] + (V_x / 3) + (V_x / 6) = 0

3V_x - 18 + 4V_x + 2V_x = 0

9V_x = 18

V_x = 2V

Hmm...I got 2V doing nodal. You sure it isn't 2V?
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Quote:
 Originally Posted by EfemaN ShouldnÃ¢â‚¬â„¢t it be 2V? The parallel resistors are an equivalent 2 Ohm resistance, bringing the total to 6 Ohms. By V=IR, thatÃ¢â‚¬â„¢s 1A of current in the circuit. 1A x 4 Ohms = 4V drop across the first resistor, leaving a potential of 2V between the second node and the node after the parallel resistors.
You're fresh and I'm old. I could have easily slipped up in my algebra. That's why I showed my work.
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Yeah it was 2V
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NO YOU MONSTERS. I was going to enroll in a circuit theory program, but after looking at that I'll stick to my demand curves and boring lectures. Thanks guys.
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Quote:
 Originally Posted by goobergump NO YOU MONSTERS. I was going to enroll in a circuit theory program, but after looking at that I'll stick to my demand curves and boring lectures. Thanks guys.
Circuits are pretty easy, IMHO.
It is 2V. The resistance in parallel (well call it R23) is 2. With the R of the series part (well call it R1) that = Req of 6 ohms. 6 volts divided by the 6 ohm Req = 1 Amp of current. So the voltage dropped on the 1st resistor would be 1A x 4R =4Volts. That leaves 2 volts left over to go to the parallel side of the circuit. In parallel volts stay the same and current splits, just the opposite of series circuits.
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