Series connection or parallel connection – calculation?
Good bye,
I am currently calculating this circuit.
I would like to calculate Rges, but I'm not sure which approach would be correct because I don't have a solution and google gemini shows me a different solution.
My calculation:
1. R1+R2+R3 = 3 + 3 + 4 = 10 ohms
2. R123||R4 = ((10*20)/(10+20)) = 20/3 ohms (6.67 ohms)
3. R1234 || R5 = ((20/3 * 10) / (20/3+10)) = 4 ohms
Thus Rges = 4 Ohm
Google Gemini
1. R1+R2+R3 = 3 + 3 + 4 = 10 ohms
2. R123||R4 = ((10*20)/(10+20)) = 20/3 ohms (6.67 ohms)
3. R1234 + R5 = 10 ohms + 6.67 ohms = 16.67 ohms
Thus Rges = 16.67 Ohm
The difference lies in the last point. Now to my question: is the last one really connected in series?
(1 votes)
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Gemini calculated the resistance of the circuit. That’s what you think of the open terminals A and B, because they hang in the air. Then R5 is in series with the remaining replacement resistor R1234.
On the other hand, you have determined the resistance from the point of view of the terminals A and B, then R5 is parallel to the remaining spare resistance R1234.
As @isohypse mentioned, here is of concern, WAS you mean with Rges.
I didn’t count the values.
According to the task, I want to do this here “Calculate now the currents I1, I4 and I5 with the help of the superposition set” and “Calculate all resistors to a great resistance” for this I wanted to summarize all resistors. Now I’m still confused with what approach the right one is.
4 Ohm as Internal resistance of the replacement source between AB It’s okay.
That it can’t be 16 ohms is clear.
But you should have said what you want to calculate and what you mean with Rges…
According to the task, I want to do this here “Calculate now the currents I1, I4 and I5 with the help of the superposition set” and “Calculate all resistors to a great resistance” for this I wanted to summarize all resistors. Now I’m still confused with what approach the right one is.
is an understandable task
is reckless if there is no further indication. Don’t think it’s like that.
The sum rule that means that the sum of all voltages (also voltage drops) in the circuit is=0. Watch the polarities!