Explained! Impedance, Admittance, Reactance, Inductance, Capacitance, Conductance, and Susceptance
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- Опубликовано: 28 сен 2024
- In this video, I'll teach you the difference between the electrical quantities of Impedance (Z), Admittance (Y), Reactance (X), Inductance (L), Capacitance (C), Conductance (G), and Susceptance (B)?
👉 Visit the full article on Impedance (Z), Admittance (Y), Reactance (X), Inductance (L), Capacitance (C), Conductance (G), and Susceptance (B):
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There are many different types of impedance components and they all rhythm, making it hard to remember which one is which.
Many even have the same units, which can lead to even further confusion.
Don’t let the same “-tance” ending fool you.
If you run into a question on the Electrical PE Exam that asks to solve for one of these components and you aren’t familiar with the exact differences, then you could end up bubbling the wrong answer even if your math and calculations are sound.
Chances are, you’ve already run into a similar mistake or headache while working sample exam practice problems.
To make sure this doesn’t happen on the exam day, let’s take a look at all the different components and define them, as well as understand where each comes from.
(Z) Impedance - A complex number. Opposes the flow of current. Impedance is the sum of resistance and reactance. Z = R+jX [Ω]
(R) Resistance - opposes the flow of current. Real component of impedance R=Re{Z} [Ω].
(X) Reactance - Opposes the change of either current or voltage. Imaginary component of Impedance X=Img{Z} [Ω]
(XL) Inductive Reactance - Reactance that opposes the change of current from an inductance component. XL = 2πfL [Ω]
(X) Inductance - A reactive impedance component made out of a coil that creates a strong magnetic field created by current flowing through the shape of a coil. [H]
(XC) Capacitive Reactance - Reactance that opposes the change of voltage from a capacitance component. XC = 1/(2πfC) [Ω]
(C) Capacitance - A reactive impedance component made out of two conducting plates that never physically touch separated by a dielectric medium that creates a polar build up of charge [F]
(Y) Admittance - How easily current can flow, or how well current is admitted. A complex number. The inverse of impedance Y = (1/Z) and the sum of conductance and susceptance Y = G+jB [S]
(G) Conductance - How well a circuit will conduct current. The inverse of resistance and the real component of admittance. G = Re{Y} [S]
(B) Susceptance - How easily a voltage or current can change in a circuit, or how susceptible a circuit is to the change of voltage or current. The inverse of reactance and the imaginary component of admittance. G = Img{Y} [S]
Units:
[Ω] - Ohms
[H] - Hemrys
[F] - Farads
[S] - Siemens or Mhos
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This 12min video helped me know more than my hours of book flipping research. thanks!
Glad it helped.
ageed
Great video clearing up the different types of "-ance's". This has made me realize how important it is to read the problem carefully and be sure you know what you're being asked to solve.
Love this video, these terms can get very jumbled in your mind and that leads to misunderstanding. Nice to see them all explained in one concise video!
This video is great for understanding the different terms and also a reminder to be aware of which units you are working in.
This is the first Electrical PE Review video I watched when starting to study for the PE, and I think it's a great little review!
Thank you very much sir for your help .
This video really helped me alot for preparing my online test in this lockdown 🙏
simply, clearly ,easily .thanks alot
You are most welcome.
Seriously, Thanks alot , cleared well this term
Glad it helped!
very helpul, sir please make some more videos for ac circuit analysis
Thanks Mati.
Thank u thank u thank u pls make more of those 🙏🙏🙏🙏🙏🙏
Which is easy to use admittance or impedance? and why?
Hi! Thank you for your help.
I have a circuit that has impedance and admittance components, if I want to find the total input impedance, should I consider the admittance component by converting it into impedance and add it to the other impedances?
Hi Avocadoe, That is correct! Admittance and impedance values are used to describe the same type of element, they just expressed differently as the inverse of the other. If you need to find the total impedance, convert all admittance to impedance first before adding all impedances appropriately depending on if they are in series or parallel.
Truely informative video
Excellent explication.
Grate teacher.
Glad you found it helpful
I concur! Only video containing them all!
There is simple mathematics that transforms Impedance to Admittance. You have ignored this mathematics all together. But it was a good show 😀
The relationship between impedance and admittance starts at 8:21. The trig identities to convert between polar and rectangular form are not included in this video but we do have separate videos dedicated to it. This channel focuses on the NCEES Power PE Exam, and since the exam approved calculator can handle these conversions for you we typically omit them for simplicity.
Hello there. I was trying to find the relationship between these two online, but I found out two completely opposite answers, and I'm wondering which one is the right one.
Is B = -1/X or is B = 1/X ?
Hi Eduard. The polarity of the angle changes when you take the inverse. For a simple experiment try the following on your calculator: 1/(5
What happens to susceptance?
please for more examples and solutions sir
The every word is useful.
Glad it helped Semih!
thank you
Gr8 job !!
how can we get j in Reactance formulas?
thanks anyway.
Hi Dwi I'm not sure I understand your question. Reactance is just the imaginary component of impedance, so it will either have a positive or negative "j" multiplied by the unit in ohms. For example, a 2 ohm inductor has a reactance of 2 ohms and an impedance of j2 ohms.
ur explanation is what i want.
so, because reactance cant be measured so it is included in imaginary component.
is it right?
Why is the reactance changing signs?
The polarity of reactance depends on if it is inductive reactance (-jX) or capacitive reactance (+jX)
how does [R/(R^2+X^2)] = G ?
Hi Somendra, would you mind telling me the particular type of problem you are attempting to solve? That will help me answer you the best. Thank you!
pe god
Thanks for compliment Jesse, glad you found the video useful.
❤️
Hi JMFX, glad you enjoyed the video thank you for your comment.
@@electricalpereview you're welcome😊
That's not a doubleyou, that's an omega..., also siemens is 1/ohms. Siemens is the multiplicative inverse (not just inverse), or reciprocal of ohms.
why inductor opposes sudden change in current?
Ans: When the current flowing through an inductor changes, the time-varying magnetic field induces an electromotive force (e.m.f.) (voltage) in the conductor, described by Faraday's law of induction. According to Lenz's law, the induced voltage has a polarity (direction) which opposes the change in current that created it. As a result, inductors oppose any changes in current through them.
who else is studying for exams?
Best I could understand
Seems like it would be better to describe inductance and capacitance clearly then build up from there. It's easy for someone like me to get lost in terms without first building an ideological foundation from which to explain the phenomena which we are actually defining. Math is important to describe the dynamic relationships between the magnetic and dielectric fields; how they operate in relation to eachother, and within the confines of the circuit. That being said if we only focus on the equations without clearly explaining the dynamic process that it is actually ocurring then what good does the math do?
Hi Connor, thanks for your comment and feedback. This is just intended to be a short explainer video and introduction on the relationships between the different variables for those that are not yet familiar. We do explore the actual theory in much more detail in our online class for the NCEES® Power PE Exam.
This is a great video that takes many different electrical terms and makes them simple to understand and the relationship between them. Thanks Electrical PE Review!
I've learned more in twelve minutes than in all my semester, and I'm french
Thanks for the comment, I'm glad you found the explanation helpful.
Awesome video sir! Thank you!
Hi AJ Glad you enjoyed it, thanks for the comment 👍
Great explanation of the "-ance" type electrical components. Still confusing to memorize but it has helped in understanding. thanks Zach
What so impedance is the constant term, R multiplied by the " imaginary term " or is the reactance transient, or is it permanent, well, permanent like a standing wave, which leads to hysterisis loss ect, is that the right way to think about it.? Transient $o every quarter cycle, ?
Very Useful video. Thanks..
Glad you enjoyed it.
Thank you this is very Helpful
Comparing all of these terms at once really cleared a lot of my confusion up!
Glad it helped
Thanks a lot. God bless you
I'm still confused a bit. Where did the j go in Xc and XL?
Don't worry, they didn't go anywhere. Sometimes they are left out when using the value in ohms to describe reactive impedance only, but are always included when using the value in complex math since they are an imaginary component.
Perfect explanation!!! Thank you!
Glad you enjoyed it.
Thank you alot , this is very good review .
Happy to help.
it's useful n Tmmrw is my xam... feeling gud to see this Tdy 😊
Glad it was helpful.
Thank you for a God-sent video!!!
You are most welcome. Glad you found it helpful.
Thank you so much sir
Thanks bro
Thank you sir
Cool, all the electronics fundamentals with 'ance' in the end.
Happy Easter!!! Bestfriend Jesus is risen!
God bless, Revelation 21:4
Thanks a lot !
thanks
Good refresher for my exam, thanks
Glad you found it helpful, hope you did well on the exam.
can anyone help me answer what is immittance ?
Immittance can be used to refer to impedance or admittance: en.wikipedia.org/wiki/Immittance
This video is ever-green, helping people even five years after it was made.
So many similar sounding terms that are easy to confuse. Thanks for clearing them up for me.
Thanks. Better than an hour long online lecture which i slept all the way .
And can you teach me why always XL is positive XC is negative?
very helpful! thank you!
Glad you found it helpful.
Where is the part of acceptance?
It comes right after reluctance.
Super helpful in clarifying these differences.
Great video, glad to check your youtube channel
Best explanation ive seen. Im a final year ChemEng student, about to graduate and as a college requirement i have to do circuits and electronics and boy am I like a deer in headlights lmao. 10/10
Glad you found it helpful Hisham! Always enjoy helping other disciplines (non-electrical) of engineers get a better grasp on the material. It doesn't have to be scary or complicated. Good luck with your finals!
Simple & nice explination sir tnq
Love it! Thank you!
Good explanation 👏 👍
10:14
... semens
This is great thanks Zach.
This explanation has helped me out a lot!
very helpful
Glad you found it helpful Aaron
thx. great help.
Glad it was helpful.
What is VARS?!
VARS is the unit of both apparent and complex power and is not a type of impedance. Only impedance terms are covered in this video.
Acronym for Volt Amp Reactance?
Just a small critique; just say equal, don't say "equal to", it sounds like you're saying "equal 2". Example, it sounds like you're saying I = 2 V/Z.
Thanks for the feedback John
He's saying "is equal to", which is absolutely appropriate.