RLC Circuits (4 of 19) Capacitive Reactance; Phase Shift, Phasor Diagrams, Frequency, An Explanation
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- Опубликовано: 19 июл 2016
- This video covers the basics of AC capacitive reactance including phase shift, phasor diagrams and frequency.
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Thank God. Finally, a theory teacher that I can understand !!! God Bless you my friend!!!
Glad it was helpful! Thanks for your comment.
very well done series. God bless you my friend!!!
pure simplicity and awesomeness. thank you. all the best.
Best lecture ! Keep up with the great tutorials !!
Helpful addition to my electrical education.
Fantastic!
I'm working my way through this series for my AC circuits class. Thank you so much! I feel so much more comfortable after watching these and taking notes!
You are very welcome, thanks for commenting. Glad that you have found the videos helpful.
Awesome 👍👏👏 video ever sir.
Thanks a ton!
Thank you. I came to this video to figure out if old capacitors that lose C will change the amount of phase shift, current, or voltage they deliver to a motor. I learned that they only decrease their current because XC (ohms) increased. This can be useful for me when deciding whether or not to replace a run capacitor in a PSC motor.
Probably the best video about this topic.
Thanks for the great comment, nuch appreciated. More to come!
You can see a listing of all my videos at my website, www.stepbystepscience.com
Well done. I'm doing a review of CC electronics course and this helped.
So glad it was helpful! Thanks for letting me know.
WOW! great way to explain the complexity of electronics. I hope that you are a professor somewhere, if not you should be...Thank you!!!!
As a retired electronic tech starting in the 60's, and a developer of 28 you tube videos, I would like to complement you on your presentation and discussion. I'm renewing my knowledge of electronic theory and really benefitting from your efforts. Thank You.
Thank you very much for the great comment.
superb explanation
You are very welcome.
Very much enjoying your videos. Great pacing.
Thank you very much! Glad you like them.
Capacitive reactance
The capacitive reactance is expressed in ohms and it is useful to determine steady-state current values to sinusoidal voltage inputs. Although the value of the reactance is expressed in ohms, it was not obtained by computing a resistance, as of resistors.
The current in the wires of a capacitor circuit is due to the resultant electric field E(NET) (a resultant of the applied field and an opposing electric field, the fringe field of a capacitor), obtained by applying the relation for current density J = σE(NET), where σ is the conductivity of the wires.
The field in the wire which may vary sinusoidally is always a resultant of the applied voltage which may be sinusoidally varying and the fringe field due to charge accumulation on the capacitor plates.
For a comprehensive description of the mechanism of current leading the voltage across a capacitor see the book references below.
Electrostatics and circuits belong to one science and not two, that of electricity and magnetism. To know how they are unified visit this link
matterandinteractions.org/articles-talks/ and view the article 'A unified treatment of electrostatics and circuits. B. Sherwood and R. Chabay, unpublished. (1999)'
pdf.
For a live demonstration of surface charge and its effects in circuits visit
ruclips.net/video/U7RLg-691eQ/видео.html
For a detailed discussion of the physics of capacitors, fringe fields, and leading currents in a capacitive circuit at different frequencies of sinusoidally varying voltages see "Electric and Magnetic Interactions" by Chabay and Sherwood
www.matterandinteractions.org
or
Fundamentals of electric theory and circuits by Sridhar Chitta
www.wileyindia.com/fundamentals-of-electric-theory-and-circuits.html
There is a "look inside" feature in the amazon.com webpage of the book "Fundamentals of electric theory and circuits" by Sridhar Chitta with a few pages of Chapter 1 which may be viewed and also which you may swipe left or press < icon to view the foreword, preface and Table of Contents.
For a lecture by Prof Ruth Chabay on surface charge in a simple dc circuit visit
ruclips.net/video/-7W294N_Hkk/видео.html
here is a nice positive comment:
THANK YOU A LOT BROTHER, it was really helping .
You 're the best!
Very good.
Great and thanks for the comment.
Many thanks for an in-depth explanation!
And again thank you!
That was ridiculously helpful
Thanks.
Dude you rock
Thank you for this amazing video, hope my teacher's would have taught me like this
Thanks for the great comment!
This was an awesome video mate. Helped me a lot with my upcoming exam. Cheers.
Great hope the exams go well. You can a listing of all my videos from my website at www.stepbystepscience.com
amazing
thanks for the help
Nice thank you!
Glad you like the videos. Thanks for your comments.
Great video! Really enjoyed it.
Glad you enjoyed it!
Very good! Thank you
You are very welcome.
Thank you!!!!! Now i'm confident that i can pass my exam !!! :D
I hope the exam goes well.
thank you, my friend... I wish they would teach like this at schools :(
You are welcome and thanks for the comment.
awsum sir,pls use a better audio device,these lectures are gold
thanks you sir
very informative, loved it.
Great, thanks for watching and commenting.
11:34, dV/dt is negative and decreasing so its absolute value is increasing that's why the I graph is getting steeper downward. (small clarification).
Thanks
you really a good teacher thank u!
That is very nice of you to say. Thanks for watching.
You can see a listing of all my videos at www.stepbystepscience.com
Excellent videos!
Excellent comment, thanks. You can see a listing of all my videos at my website, www.stepbystepscience.com
I have a question, regarding a RL or RC parallel or series circuits what is the real application?. I mean we know how to calculate the impedance in AC the voltage and the current. but for what reason one would like to change the phase between current and voltage in real life degind application? do you have any examples?
thanks a lot!
Thank you !
I love this material
Thanks for saying so, I took a long time to put those videos together.
you are AWESOME
Thanks for saying so. You can see a listing of all my videos a my website, www.stepbystepscience.com
tq sir
Hello I like your way of teaching. How do you prepare this contents? Which software do you use to draw?
Everything I do is very low budget. The graphs are done with an online graphing program and then I just took a screen shot. Otherwise the presentations are done in keynote, and the video is recorded with a program I bought for about $100 called Screenflow, works very well. Everything else comes preinstalled on my MacBook Pro; camera and mic.
@@stepbystepscience Thank you🙂
Hey, thanks for the video! Are you sure, that the drawing at 4:15 is right? Because current leads the voltage, so current has to be 90 degrees + to voltage if you are going clockwise. As it shown in your diagram that's an Inductor. If not please correct me!
It is the convention to go counterclockwise. His representation is correct.
Why cant my lecturer explain it this clearly. Awesome video thanks
Just tring to go Step By Step, in fact you can see a listing of all my videos at my website, www.stepbystepscience.com
execelent
Thanks, you can a listing of all my videos from my website, www.stepbystepscience.com
tks you are a vrery good teacher and with youtube everybody can learn from you.So a big tks from Romania and keep the good work
Can you please explain to a poor soul, if they 're us what applications for capacitor self resonance is, when they say, it's an efficient frequency filter, does that mean they are actually putting out radio frequencies, Some claim there are super conduction effect, because then the L and C component are perfectly matched. The industries act like this is bad inside a network though. And, at a cpacitors, self resonant (it's own RLC ) frequency, does this mean the currant and voltage, are in perfect phase in time. I'm probably screwing this way up. And, if a circuit isn't powering enough of a load, will occisilations in this resonating capacitor, build up enough energy to destroy itself,
As a side note, this lecture taught me that Omega's lowercase is ω. For those of you with OCD like me, ω is just as much Omega as the Ω symbol.
why does change in frequency changes the reactance.Increase in frequency decreases the capacitance......Why?
plz tell me the answer.I'm so confused regarding the cause of its increase and decrease due to reactance.
The capacitance of the capacitor does not change. But increasing the frequency does cecrease the capacitive reactance....because then the capacitor does have time to fully charge and the AC current can continualy flow back and forth "across" the capacitor. The capacitor does not hinder the flow of the AC current. It the capacitor fully charges then the current becomes zero as it does in a DC circuit. Does that help? A bit hard to explain here. You can see a listing of all my videos at my website, www.stepbystepscience.com
nice positive comment below
That is exactly what I wanted, thanks!
Why is it not negative?
Why is what not negative?
dont say I never hook up my boys yerrrr
thanks very much, good work
Thank you very much for the comment. You can see a listing of all my videos at my website, www.stepbystepscience.com
amazing
Thanks.