Physics 49 RCL Circuits (2 of 13) Complex Numbers

  Рет қаралды 86,720

Michel van Biezen

Michel van Biezen

Күн бұрын

Пікірлер: 48
@Lexyvil
@Lexyvil 2 жыл бұрын
The best teacher I currently know. I was stuck trying to understand impedance and complex numbers for days. Amazing explanation, professor!
@MichelvanBiezen
@MichelvanBiezen 2 жыл бұрын
Great to hear! (I went to school in Edmonton a LONG time ago)
@zeyadramadan8759
@zeyadramadan8759 3 жыл бұрын
Best teacher ever. Please keep it up. You are really simplifying things to us.
@MichelvanBiezen
@MichelvanBiezen 3 жыл бұрын
Thank you! 😃
@yuhema9779
@yuhema9779 2 жыл бұрын
Sir you are my hero!!! I am taking intro to computer and electrical engineering this semester and your videos on circuits are of great help!!!!!!!
@MichelvanBiezen
@MichelvanBiezen 2 жыл бұрын
Glad to hear it. Keep up the good work!
@rievezahl
@rievezahl 5 жыл бұрын
Thanks for this pristine, super educative presentation! Even though the bar of your competition here on youtube is rather low, its not just a little better than any other video, its like exactly what i hoped to find! keep up the great work!
@MichelvanBiezen
@MichelvanBiezen 5 жыл бұрын
Thank you
@frankreiserm.s.8039
@frankreiserm.s.8039 6 жыл бұрын
You are the most understandable person that discusses RCL circuits. Unlike general matnematics, use j to represent an imaginary number in electronics: j20
@Dog-ct8hs
@Dog-ct8hs 6 ай бұрын
j is common in EE.
@yourlordandsaviouryeesusbe2998
@yourlordandsaviouryeesusbe2998 3 жыл бұрын
You're a God, Mr. Biezen
@MichelvanBiezen
@MichelvanBiezen 3 жыл бұрын
You can be assured that I am not. Just a man trying to do his part in the world.
@tommaher6978
@tommaher6978 Жыл бұрын
Really good . And slowly explained with easy to follow steps. Thanks
@MichelvanBiezen
@MichelvanBiezen Жыл бұрын
Thank you. Glad you found our videos! 🙂
@deustitties3589
@deustitties3589 6 жыл бұрын
How the hell am I finding your videos on RLC circuits only now. I've been a subscriber for quite some time and all I find on KZbin when it comes to RLC are mostly some hard to understand indians. KZbin's algorithms are completely broken. Your lectures are super helpful.
@MichelvanBiezen
@MichelvanBiezen 6 жыл бұрын
The best way to find them is to go to the home page on this channel. All of the playlists can be easily found from the home page.
@shreyasdeshpande3042
@shreyasdeshpande3042 3 жыл бұрын
Very good teaching sir👏 Respect from India.
@MichelvanBiezen
@MichelvanBiezen 3 жыл бұрын
Welcome to the channel!
@hasanyahya9171
@hasanyahya9171 5 жыл бұрын
You had presented a whole of subject clearly. However as a beginner I am still doubtful about RL. Does it (RL) alway exist in any inductor? Is this cause of the nature of any conductor as it long enough ? Thank you professor.
@MichelvanBiezen
@MichelvanBiezen 5 жыл бұрын
Yes, every inductor has inductance and has some internal resistance if there is no external resistor. Sometimes we ignore the internal resistance in order to show a particular property or law. Note that inductors oppose a CHANGE in current.
@midnightson787
@midnightson787 6 жыл бұрын
Excellent video thanks
@yajatdalal1823
@yajatdalal1823 6 ай бұрын
Great Explanation 👍
@jetlinux
@jetlinux 6 ай бұрын
Brilliant sir!
@MichelvanBiezen
@MichelvanBiezen 5 ай бұрын
Thank you. Glad you liked it.
@mahmoudeldesokey147
@mahmoudeldesokey147 5 жыл бұрын
Please sir, what do we mean by representing reactance And resistance as phasors? I am confused because representing them as phasors means they will have instantaneous values as these phasors rotates And i think that reactance And resistance are constants.
@MichelvanBiezen
@MichelvanBiezen 5 жыл бұрын
When they are represented by phasors, we recognize that the voltage and current is time variant and the phasors rotate per wt. The phase angle for each component indicated the phase difference between the voltage and current for each component, which in the case of a resistor is zero.
@carultch
@carultch 2 жыл бұрын
Phasor is a compound word of phase and vector. Sine waves have the general equation of Y=A*sin(w*x + phi). A vector of magnitude A, and direction phi as an angle from the positive real number axis, is how we keep track of both the amplitude A and phase offset phi, when we have multiple sine waves at play in a given problem. Think of a phasor as a vector that is continuously rotating around the origin. The projection onto the real axis indicates the real time value of the quantity represented by the phasor. A phasor that is 90 degrees away from it, means the phasor represents a waveform that is a quarter cycle different from the first waveform.
@LinhNguyenNhat-ib4su
@LinhNguyenNhat-ib4su Жыл бұрын
Sir, If one current I = -20-j50 , transform this into sine equation, phase angle = arctan(-50/-20)= 68.2 = phase angle in sine equation, right??? Can you explain the way to convert complex numbers to sine equation, Sir? please, I have trouble with phase angle , which angle to be chosen?
@blahblahblah747
@blahblahblah747 8 жыл бұрын
Great stuff, thank you!
@BiranchiNarayanNayak
@BiranchiNarayanNayak 9 жыл бұрын
Nice tutorial..
@akabir8248
@akabir8248 6 жыл бұрын
I appreciate
@jasonhall947
@jasonhall947 5 жыл бұрын
Thank you!
@ugursoydan8187
@ugursoydan8187 4 жыл бұрын
why are we using imaginary numbers? shouldn't be the impedance square root(R^2+XL^2)?
@MichelvanBiezen
@MichelvanBiezen 4 жыл бұрын
The magnitude yes, but when you want to represent the phase angle, you'll need imaginary numbers.
@ugursoydan8187
@ugursoydan8187 4 жыл бұрын
@@MichelvanBiezen but in other videos,you use this in this form when you are calculating the impedance(with imaginary part). but shouldn't we use it square root(R^2+XL^2) form when we are calculating the total impedance?
@MichelvanBiezen
@MichelvanBiezen 4 жыл бұрын
Yes, when calculating the magnitude of the reactance or impedance, but you need the complex representation to show the phase angles between the currents and voltages.
@ugursoydan8187
@ugursoydan8187 4 жыл бұрын
@@MichelvanBiezen ok thanks
@mab7727
@mab7727 2 жыл бұрын
That Tie is the best thing in this video .. jk, great job! ty
@MichelvanBiezen
@MichelvanBiezen 2 жыл бұрын
Thanks! 😄
@honestman276
@honestman276 3 жыл бұрын
Thanks. From Bangladesh.
@MichelvanBiezen
@MichelvanBiezen 3 жыл бұрын
Welcome to the channel!
@mechanicclemont4799
@mechanicclemont4799 2 жыл бұрын
Although complex number is an important concept in engineering, the screen quality is too bad :(
@MichelvanBiezen
@MichelvanBiezen 2 жыл бұрын
Yes, our older videos are a bit darker. We have added more lighting and used a better camera for our newer videos.
@ahmedal-ebrashy3691
@ahmedal-ebrashy3691 3 жыл бұрын
What is an imaginary resistance? The concept is strange.
@carultch
@carultch 2 жыл бұрын
Imaginary resistance is a contradiction of terms. An impedance can be real or imaginary, or a combination of both, but a resistance is only real. Impedance is an extension of the concept of resistance to the complex number domain, so that it can keep track of both resistances that are real numbers, and the effects of capacitors and inductors that have a reactance rather than a resistance. When impedance is a pure imaginary number, this means that the impedance is entirely reactance, and no resistance. That means that the circuit section in question consists only of components that store energy, and no components that dissipate energy as heat. Reactance means the component stores energy and releases it at a later portion of the cycle.
@jagatkumartudu
@jagatkumartudu Жыл бұрын
Sir ,how can I contact u ,any phone contact
@MichelvanBiezen
@MichelvanBiezen Жыл бұрын
We are very busy, and prefer to communicate via the comments. (always make a new comment instead of keeping a chain going or we may not fint it, since we receive many comments each day).
@tangoterrier
@tangoterrier 2 ай бұрын
Great talk shame it is so dark
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