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How to calculate the EMF in a circuit with 2 opposing batteries?
Absolutely true. But I was pointing out (as per your previous comment) the fact that anyone can sit the exam (passing or not is irrelevant) to explain why this is not a question to test what you have learnt, simply because it isn't part of a class and whether you have learnt a particular topic...- Total Novice
- Post #42
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
I just wanted to provide some context on this exam for people who have been helping me. This exam is called the gamsat, interested parties can look it up. Anyone can do it regardless of your background. The exam covers biology, chemistry and physics but not in the conventional factual...- Total Novice
- Post #40
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
Okay I am going to make some observations here: Some people seem to say EMF is not the same as voltage (and I would agree as my research told me so, but I do not understand the difference). For example, Che12345 wrote: (here it is claimed that voltage is not the same as EMF) but then at times...- Total Novice
- Post #31
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
@Che12345, I completely agree with most of the things you have said. It is clear to me that the EMF is the voltage across a battery when it is NOT connected to a load. However the circuit in the question has a load. You can see it, it has a resistance of 4.5 Ohms. So then my question is...- Total Novice
- Post #26
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
Firstly I apologise for "ignoring the signs". I don't study electrical circuitry and learnt the basics just for this question so I don't really know how to do that. I would like to check that I understood something by asking a few questions and answering them myself. 1. What kind of circuit...- Total Novice
- Post #25
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
Just realised I didn't actually post actual wording of the question itself. Edited my first post to include the question now. So sorry everyone.- Total Novice
- Post #17
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
Thank you 3DDave for the explanations. Unfortunately my confusions have not been fully cleared yet so I am going to leave this for awhile and maybe come back to it later. But if you or anyone has nothing better to do... then here are a few more of my questions. "EMF is the unloaded voltage and...- Total Novice
- Post #16
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
@3DDave Okay thank you, I understand this equation and thanks for telling me about the convention. But my other question remains, which is why use this equation: This calculation gives us the voltage. If the question were asking for the total voltage or even the current, I suppose then this is...- Total Novice
- Post #14
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
If the goal is to "get the number 18", then it is easier to subtract 6V from 24 to give 18V. My question is how do I know that is what I am supposed to do, since, it asks for the EMF and when searching for EMF calculations, I am told to use the e = V + Ir which to me, bears no resemblance to...- Total Novice
- Post #12
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
Thanks everyone, as I said, I don't know anything about electrical engineering so there are a lot of terms I don't know, like what terminal voltage is. To answer Waross' question : Question for your instructor; "Were would we see this circuit in the field?" and "Would this work?" These...- Total Novice
- Post #9
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
Regarding where I got this question from (@3DDave), this is a standalone question in a GAMSAT practise booklet. This exam and their practise booklets are, if I must say so myself, notorious for very badly worded questions and answers that are more about corrupting the wording of the question...- Total Novice
- Post #3
- Forum: Circuit design
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How to calculate the EMF in a circuit with 2 opposing batteries?
EDIT: Just realised now I didn't post the actual question. So sorry everyone. The question says "What is the resultant EMF in the circuit?" Hello, I am not an electrical engineering student/engineer, but I have a related question I was hoping someone could help answer. Here is a picture of the...- Total Novice
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- Replies: 41
- Forum: Circuit design
