# Search results

1. ### Phasor Leading and Lagging Angles

1.) Can you provide a reference about this for phasors? 2.) If n≥0 why did you express "V2 leads V1 by -20°" 3.) The terms "Lead" and "Lag" already contain information about which way to traverse the angle from the REFERENCE phasor. What does the negative mean in "V2 leads V1 by -20°"...
2. ### Dielectric Polarization Components in Ideal RC and C circuits

Any takers? I haven't got any replies yet, wondering if I am missing any information or if what I have posted is not clear enough or too abstract. Feedback would be appreciated. Thanks again.
3. ### Phasor Leading and Lagging Angles

Consider two voltage phasors: V1 = 1 volt @ 50°, and V2 = 1 volt @ 30°. It follows then that the relative phase shift between these two phasors can be expressed by any of the four following descriptions in terms of leading and lagging angle relationships. 1.) V1 Leads V2 by 20° 2.)...
4. ### Dielectric Polarization Components in Ideal RC and C circuits

Hi, I would like to know what the theoretical implication is, as it pertains to RC circuits of the following hypothetical situation(s): If one were to connected an ideal discharged capacitor in parallel with an ideal voltage source with zero resistance in the loop, the calculated RC time...

Any takers?
6. ### Voltage Vector/Scalar Components, SI Units, Direction and Polarity.

All, please help me refine, restate, explain, understand, expand, add, remove, answer the below statements/ questions. Thanks in advance. 1.) Voltage is considered a scalar quantity. (J/C in SI Derived Units) which is a magnitude of energy per coulomb...no direction with this example. Some...
7. ### Inductor coil

Is it true that when a lower voltage is applied across an inductor it burns up the coil? If so can someone please explain why?
8. ### Power Factor

had a feeling that, that was the reason, but wasn't sure....thanx
9. ### Power Factor

Why is it that the utility will penalize a customer for a low power factor. I cant imagine why they would penalize you if a purely reactive load puts all its power back into the mains.
10. ### 460v/480v Code

Is it against code in any way to have a 460v motor connected to a 480v supply voltage? What problems can be encountered when doing this? Thanx
11. ### VFDs and Motor Configuration

Can someone please give me some general rules of thumb in dealing with VFDs and 3 phase dual wye motor winding configurations. I would like to know when you would wire the motor up for a low voltage or high voltage application when using it with a VFD,under what conditions, and why. Thanx
12. ### Phase to Phase fault?

In a 480v Three Phase Induction Motor.....what kind of educated guess or assumption can be made as a cause, when two of the three fuses blow? Is there any type of significance in two fuses blowing instead of just one in a three phase motor circuit? If only one fuse blew it basically would...
13. ### Step Up Transformer

It is understood that you cannot have something from nothing, but how is this the case with a step up transformer? It seems that stepping up the voltage is stepping up the potential energy and since more windings actually increase the resistance there will be lower current which is how most...
14. ### IEC Contactors

Thanks, for some reason I was thinking capacitor since it said starter.
15. ### IEC Contactors

Can someone explain to me what a 3 phase IEC Contactor/starter is, how it works, and what its used for? Thanks
16. ### Current Inrush

sorry but I don't think this is the answer my question.
17. ### Current Inrush

So......let me see if i got this....... In reality....for a motor, current inrush is the "true" current value respective to the resistance of the windings. however what we see when the current sags (after the inrush) is really the back emf generated from the motor actaully moving? and with...
18. ### Current Inrush

When you have a current inrush from turning on a devise, does that mean there is actually less resistance for that brief amount of time?
19. ### Voltage Drops across Resistive Elements

This is awesome....its like a jigsaw puzzle. The most help I have recieved from this forum. Thanks! Now I have to spend some time to realize "why" this stuff actually happens.
20. ### Voltage Drops across Resistive Elements

Makes sense, but this is not really regarded as voltage drop (kinetic energy) its actually potential that premeates the infinite resistance......is there a term for this?
21. ### Does your brain outpower a computer?

Guys seriously.......Do you think a computer could ever come up with this conversation?

23. ### Voltage Drops across Resistive Elements

Thank You! This is "exactly" what I thought. Can you believe a group of Engineers had told me otherwise. Now...is it safe to assume that because Ex=(Rx/Rt)Et......The fraction of Voltage drop (Ex) across a single resistor (Rx) is actually represented as if that same resistor (Rx) under...
24. ### Voltage Drops across Resistive Elements

I can see you guys are confused with my wording. Let me draw something up. Ill get back with you.
25. ### Voltage Drops across Resistive Elements

Well I don't know solid state physics but at least its a sensible answer. Could you elaborate a little on the concept of this in relation to my question. Thanks. Yes I understand all of this but here is where I'm at...... Consider a short circuit condition with a load.. the voltage...
26. ### Voltage Drops across Resistive Elements

You are absolutely right that it helps but I am "looking" for the understaning of it.
27. ### Voltage Drops across Resistive Elements

V=IR is the relationship..... yes. but that doesn't answer my question.
28. ### Does your brain outpower a computer?

Vegetable...a not so intellegent lifeform (figurative) Having "DNA" is not being programmed, it is your "genetic makeup" or "design" that you are refering to.... Now I guess you could say we are programmed to breathe, but "programmed" isn't the right word here. All life has an...
29. ### Does your brain outpower a computer?

True, but humans have the ability to think, and the will to do it whether they like it or not. as robots do not. Thats the point, "IT" can't make reasonable choices. We obviously made it's choices first. If it were able to "learn" as you imply. Then it would be able to determine whats...
30. ### Voltage Drops across Resistive Elements

Allow me to rephrase....The way I like to think about resistors in series is imagining one big long resistor.... with segments of more dense atoms in sections representing the heavier consentrations of resistance or resistors. Like you said there is a "continuous" drop across the entire...