Polarity matters and you always assign polarity to everything even in AC. If you don't take polarity into account how else do you analyze AC circuits. Now if you have an AC source hooked up to one coil the coil will always have the same polarity no matter how you insert the coil into the...
Are you saying that polarity has no meaning in AC circuit analysis. We assign polarity to everything so we can do ac circuit analysis... ohhh boy this is some basic stuff.
Andrew, I am taking away absolutely nothing from our conversation so I will cut it short.
If you switch the leads you are flipping the coil! AHHH this is not complicated! I don't think you are thinking the same thing I am thinking. Let just simplify it. If you have an AC source hooked up to ONE coil. The + of the source is going to lead C1 of the coil and the - of the source...
I think I've come to the realization I won't get a satisfactory explanation over the internet so no need to reply. I think I am going to have to pester some electrical engineering profs.
I did workout everything with the right hand rule and I did come to the conclusion that the direction of winding doesn't matter. But WHY do meters have polarity markings on them. I just figured out using the right hand rule that the induced emf is always going to be the same no matter how the...
you cannot measure 3 phase power with one meter, its called the "two watt meter method" for a reason. You haven't really explained anything. Your second paragraph contradicts your first. First you say that the direction of current is independent coil winding. then in the second paragraph you...
I don't think that's how it works. You only need two watt meters to measure 3 phase power. It's pretty simple to measure power. Vrms*Irms*cos theta, where theta is the angle between V and I. Now you still haven't answered my original question. How does the direction of winding (clockwise or...
I thought I was clear in my problem statement but I guess not. Ok the specific application I am confused about is a watt meter. For those of you that don't know what a wattmeter is: it measures power. A current coil is placed in the circuit and a potential coil is placed across the load. Now...
Collin, what you've typed I already know. I know that the direction of the magnetic field changes but what I was asking is how to determine the polarity of the induced emf. The specific application I am confused about is a wattmeter. it does matter how you hook up coils in a wattmeter...
I already know the basics. E=L di/dt. So you're telling me that the direction in which a loop is wound has no meaning. Then why do transformers and potential and current coils all have polarity markings on them? What determines the polarity?
So I've been told that the direction that you wind a coil will determine the polarity of the induced voltage across the coil. I drew out two coils with clockwise and counterclockwise winding direction and with using the right hand rule and saying that the positive polarity of the induced...
Could someone give me an intuitive explanation as to why the current lags the voltage in an inductive circuit. I can understand it through the equation E=ldi/dt. But how exactly does the current lag, on a molecular level?
So because P is proportional to the voltage squared we take the integral of the voltage squared with respect to time and then square root it at the end to just get the voltage and the basis of this is off of the fact that we need to find equivalent heating effects between ac and dc? Also what...