- #1
Don't worry, this is not a school hw, shouldn't the current be 5A? Since the current only flows through the 0 Ohms path?berkeman said:Is this for schoolwork? What do you think the answer would be?
Ok, let me think, if the parallel resistance is (5×0)/5+0, this means the parallel resistance is equal to 0 Ohms, if the 2 Ohm resistance is series doesn't that mean 0+2 Ohms? Correct me if I'm wrongDale said:Hint, for a voltage source the 2 Ohm internal resistance is in series with the 10 V.
Yes, exactly!Kevin J said:shouldn't the current be 5A?
Thanks! People here are so nice, in physicsstackexchange, they are sometimes very rude, every question I asked is considered as a duplicate and they even banned me from their forum :(Dale said:Yes, exactly!
Kevin J said:Then what about this, I saw this video from youtube, is this even correct? Shouldn't the resistance being considered in the calculation, is the internal resistance of the battery? View attachment 233635
Which person? Can you post a link to the video?Kevin J said:The person on the web
Wrichik Basu said:Which person? Can you post a link to the video?
Same reason why I sought refuge here in PF. I still have an account in physics StackExchange, but I go there once in a long while to chat with old friends who are reluctant to come here.Kevin J said:Thanks! People here are so nice, in physicsstackexchange, they are sometimes very rude, every question I asked is considered as a duplicate and they even banned me from their forum :(
and how do you count the battery's maximum current, is it it's voltage divided by it's internal resistance?Delta² said:Ok, well the video discriminates between two cases:
The ideal case: I agree with the video that current will be infinite, because an ideal source can keep steady voltage even for infinite current through the source.
The practical case: I partially agree with the video. The current in this case will be finite(it will not be 10A as the video says) but very large, it will start from 10A and rise to the large finite value (which will be the maximum current that the non ideal voltage source supports). Then one of the following things can happen because the voltage source is not ideal and can support up to a maximum value of current
1) The voltage source might catch fire
2) The voltage source might drop its voltage and so the current will drop back to a lower value
3) If the voltage source is protected, then just the fuse will intervene and the current will drop to zero
4) In general some other unpredictable thing , like the short circuit path catching fire (because it will become extremely hot due to the large current) e.t.c
Maybe you could take as an upper bound that value (EMF/internal resistance) , because for this value the voltage drop at the battery's terminals will become zero but I think most batteries can support maximum current that it is quite smaller than this value.Kevin J said:and how do you count the battery's maximum current, is it it's voltage divided by it's internal resistance?
Try that math again...Kevin J said:The person on the web says the 10A flows through the short circuit(0 resistance path), but how do you even get this conculsion? If we take a look at the problem, the total parallel resistance would be (10×10×0)/10+10+0=0 Ohms...
What do you mean try the math again?0 divided by 20 is 0russ_watters said:Try that math again...
0+10 is 10Kevin J said:What do you mean try the math again?0 divided by 20 is 0
The usual problem when we don't use latex, we forget to put parentheses and this can mess a lot things. He means (10x10x0)/(10+10+0)russ_watters said:Try that math again...
A zero-Ohm path is a circuit component that has zero resistance, meaning that no voltage drop occurs when current flows through it. It is often represented by a resistor with a value of 0 ohms.
Current flows through a zero-Ohm path in the same way as any other electrical path. It follows the path of least resistance and flows from the higher potential to the lower potential. The only difference is that a zero-Ohm path offers no resistance, so there is no voltage drop.
The purpose of a zero-Ohm path is to provide a connection point for current flow without introducing any resistance. This can be useful in complex circuits where multiple components need to be connected, or in situations where a temporary connection is needed for testing or troubleshooting.
Technically, yes, a zero-Ohm path can be replaced with a wire. However, it is important to note that a wire will still have some small amount of resistance, whereas a zero-Ohm path has none. This may affect the overall performance of the circuit.
A zero-Ohm path and a short circuit are often used interchangeably, but there is a subtle difference between the two. A zero-Ohm path is intentionally designed into a circuit, whereas a short circuit is an unintended connection that can cause damage or malfunction. Both offer a path of low resistance, but a short circuit can cause problems, while a zero-Ohm path is a deliberate part of the circuit design.