Complex Numbers: AC Circuit Application

AC Circuits use Complex Numbers to solve Circuits

[pablogimenez]

In an inductors, voltage leads the current by 90 degrees. Or the current lags the voltage by 90 degrees. The opposite is true for a capacitor.

[tillifindu]

Thanks for the video, just a query, when we say that voltage lags in inductance, does it not imply that the graph is shifted to the right. And similarly for lagging, the graph should be shifted to the left. Am i wrong ?

[doom_field]

What does the angle represent? in other words, why is it important?

[Thesituation]

this video help
but i had to wait 8:20 
lol thank u 

[WordlessAmrit]

excuse me pure inductive circuit current is lagging by 90 degree, , , , amn't i

[Cu_Ty_Pro]

I HAVE TO SAY THIS IN CAPITAL, TO EXPRESS MY FEELING ABOUT HOW THANKFUL I AM TO YOU, AND YOUR EXCELLENT JOB OF EXPLAINING HOW TO GET THE Z IMPEDANCE AND ITS PHASOR ANGLE.


THANK YOU SO SO MUCH !


IT IS A VERY EASY CONCEPT, BUT I HAVE BEEN LOOKING AROUND ON THE INTERNET FOR HOURS, JUST TO UNDERSTAND HOW THEY COULD COME UP WITH THE NUMBER + THE J, AND A PHASOR ANGLE AFTER.


THE VIDEO MY INSTRUCTOR SHOWS TO GET THIS IS RATHER LONG AND COMPLICATED.


YOUR VIDEO, IN CONTRAST, IS SUPER NEAT, SUPER CLEAN, SUPER EASY TO COMPREHEND.


THANKS A MILLION !

[tiagotoledo]

There`s, still, a grave mistake. Repeating what has been already comented by Bunnyy 83:

"The correction is also wrong ^^. As said the graph is actually right but what is said is wrong. Inductive loads --> current lags voltage and not voltage lags current. If you reverse the two things the "lags" becomes a "leads". So indeed the voltage does lead the current since the current lags the voltage. Just as "A > B" is the same as "B < A""

Thank you for the video!

[larrybadgett]

Z is a complex number. The resister is the real part. The Inductor minus the capacitor are the imaginary part.

[Nshiime]

Can I just say that you have literally saved my life.very wonderful simple explanation.Thank you so much

[sunilgokhale]

At point 3.03 when you drew graph and explained lead lag concept, the current in the circuit leads voltage across the capacitor and lags the voltage across the inductor.. You said it other way I think.

[Cinqmil]

2:57 You make a grave mistake here.
*In circuits with primarily inductive loads, current lags the voltage.*
*In capacitive circuits, current will be leading the voltage.*

Videos like yours make it unnecessary hard for students to understand the basics. Please correct the error or remove the video.

[ohms]

at 2:58 in Inductor the correct is V leads I by 90 degrees or I lags V by 90 degrees not V lags I by 90. Same with Capacitor it's also incorrect, in capacitor I leads V by 90 degrees or V lags I by 90 degrees not V leads I by 90 degrees.

[shikharbind]

This is not the compex number method....this is phasor diagram method....complex number method is used to make the calculations faster. & Calculations are done in eular form
So please don't use wrong captions to bring attention....Its complete waste of time

[fivosteren]

Excuse me, I'm not implying that i know more, but doesn't in time 2.50 the voltage in an inductor leads the current by 90 degrees and in time 2.59 the voltage in a capacitor lags the current by 90 degrees?

[renusahu]

GUYS READ MY COMMENT..
cause there is nothing like complex method in this video.. Complex method is another method which makes AC calculations very easy...TY

[manoharping]

Sorry Madam, For an AC Circuit In case of Inductor Voltage leads the current by 90° means current is lagging the Voltage by 90° and In case of Capacitor Voltage lags the Current by 90° it means Current is leading the Voltage by 90°.

[Mir]

Best video ever...
I cant possibly thank you enough.
Please keep going.

[tobes]

Thanks so much for taking the time to make this video for us all!
Just a quick question, is your final answer equivalent to the mathematical expression

z=46.57(cos(15')+isin(15')? Thankyou!

[CutinChai]

excellent video but only thing missing is the complex number by adding angle for L & C in your calculation for Z.

[jennifersiagian]

thank you for good teaching (I wish my mind can receive it) but I will on trying.. Math is the Creators language I want to know..