Is there anybody that can explain negative voltage and show illustrations? Is there any good material online where you can learn about negative voltage? Please help-this is driving me crazy!
Thanks in advance.
Thanks in advance.
I recall the last time this question was asked, it resulted in a rather interesting (often heated) discussion: http://forum.allaboutcircuits.com/showthread.php?t=1892Is there anybody that can explain negative voltage and show illustrations? Is there any good material online where you can learn about negative voltage? Please help-this is driving me crazy!
Thanks in advance.
like it has been stated before.
since negative is at a negative polarity (duh) with respect to ground.
it can well be said ground is a positive polarity and -ve one acts as ground
since potentials are relative concept absolute zero potential may not be defined.
like mr cumesoftware just said.
btw dont touch negative polarities since they may act as ground or else you wud act as positive polarity
I think that was the question in here. Sorry if I missed the point.Is there anybody that can explain negative voltage and show illustrations? Is there any good material online where you can learn about negative voltage? Please help-this is driving me crazy!
Thanks in advance.
I concur. The important aspect of voltage is the differential, i.e. if the voltages are -250V to -240V it is a 10V difference in the same way if the voltages are 500V to 510V. I would be interested in seeing this 'negative voltage' concept written in context - does anyone have any text/papers where it is stated?This whole discussion is a complete red herring. Voltage is voltage and one side of any non zero measurement is greater than the other. One is positive with respect to the other, and one is negative with respect to the other. Potential functions in physics, including voltage, are largely unconcerned with absolute scales. Only temperature in degrees Kelvin (Rankine) has an absolute zero.
Of course. As I said, the potential of objects cannot be determined in absolute terms. In order to simplify, it is considered a ground and all voltages relative to it. So when refering to 5V, it is 5V relative to ground. Is just a convention like any other.I concur. The important aspect of voltage is the differential, i.e. if the voltages are -250V to -240V it is a 10V difference in the same way if the voltages are 500V to 510V. I would be interested in seeing this 'negative voltage' concept written in context - does anyone have any text/papers where it is stated?
Dave
I think the issue here was having negative potential diferences relative to ground. It was not about potentials. That's why I put this in post scriptum.P.S.: Ground is normally considered at 0 potential, although in reality the potential of objects is unknown and cannot be evaluated, only their differences can.
Sure. Given this is a question that has been asked several times before, I still would be interested in seeing 'negative voltage' written in context in a published text/paper - I would like to see why this confuses so many people when it is a relatively simple idea.Of course. As I said, the potential of objects cannot be determined in absolute terms. In order to simplify, it is considered a ground and all voltages relative to it. So when refering to 5V, it is 5V relative to ground. Is just a convention like other.
You can see this concept in datasheets, for example. See the LM7905 datasheet, for example, or the specifications of a computer PSU. It is a correct concept. You consider a ground, they you may have positive poles or/and negative poles. We may say negative voltage, but being voltage = potential differential, we have negative potential differential. Convening that the potential differential can be stated as the diference between the measured pole and the reference pole, why not having negative poles?Sure. Given this is a question that has been asked several times before, I still would be interested in seeing 'negative voltage' written in context in a published text/paper - I would like to see why this confuses so many people when it is a relatively simple idea.
Dave
Sorry, no. I'm away from my own workstation for at least another week. Once home again I can do so easily enough.Can I get a better explanation than that? How about tracing the circuit that the electrons take?
And my bank account.Only temperature in degrees Kelvin (Rankine) has an absolute zero.
what else can we help u with,I thought I could get some real help. I guess I was wrong.
The electrons will take the path from the more negative potential to the more positive potential. The potentials can then be understood relatively as discussed before. The important aspect of voltage is the differential. Only when you put it into a circuit to the values become important relative to one another.Can I get a better explanation than that? How about tracing the circuit that the electrons take?
I'm sorry you feel like that, but what you need to know about negative voltage has been covered in this thread. Perhaps you could take me up on my suggestion previous and show us an example of where the concept 'negative voltage' is used and we can try and help from there.I thought I could get some real help. I guess I was wrong.
by Duane Benson
by Jake Hertz
by Jake Hertz
by Jake Hertz