- Joined Apr 1, 2016
Try it both ways and see if you have an answer that matches one of the options given.The second pic is what I did. The reason I have two resistors. One is 8 ohm and one is 6 ohm. The way the problem looks . The image is blurry on the resistor. It kind of looks like a 6 or and 8.
I tried it with both the 6 and the 8 ohm. Did not get any of those. I am not sure what I am doing wrong.1) Do you know how to calculate the equivalent resistance of two resistors in series?
2) Do you know how to calculate the equivalent resistance of two resistors in parallel?
But you are calculating the equivalent resistance of resistors in series using the formula for resistors in parallel. It appears that you may be having trouble distinguishing between resistors in parallel and resistors in series.I know how to calculate series and parallel.
You might be right. I guess I just have to practice more.But you are calculating the equivalent resistance of resistors in series using the formula for resistors in parallel. It appears that you may be having trouble distinguishing between resistors in parallel and resistors in series.
In mrchips example. Is it r1 and r2 in series?There are two resistors that are in series. You need to identify them. You are getting the wrong answer because of them.
MrChips gave a good example:
There are 2 resistors in series please identify them. We can then progress to the next step.
Hint: It would be the resistors that have ALL of the current in the circuit passing through them.
Another thing to consider, I am trying to make sure you have a basic understanding before trying to solve the problem. If R2 is variable what is the minimum resistance the circuit can have and what is the maximum resistance the circuit can have? In one case R2 is shorted and in the other case open.
Imagine current is flowing into the top and through the circuit to the bottom. Current in must be current out. The resistors that are in series will have all of the current going through them. Where does the current 'branch' and has multiple paths? Those would be in parallel.In mrchips example. Is it r1 and r2 in series?
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by Jake Hertz
by Jake Hertz