Lesson 3 - Sinusoidal Sources, Part 2 (AC Circuit Analysis)

[@markcollins4654]

Why do the videos cut off all the time. Was there more to this ?

[@bobbytaraantino]

As a student from a third world country. It sucks for us to pay.

[@dkkektmsnsndm2084]

+1.. I think he didn't get the money that he expected from NASA. He wants to be a billionaire.

[@tmst2199]

@@dkkektmsnsndm2084 Ah, the irony. BTW, I think Halliburton got that money to foment terrorism around the world. Peaceful public space programs like NASA which unite humanity don't do so well.

[@veritasiumaequitasius3530]

@@tmst2199 NASA is a laundry for defense & other budgets.

[@sridharchitta7321]

A sinewave depicts movements in the form of waves. It has a datum, rapid, slowing and steady growth in one direction for a quarter cycle with reference to a datum (a reference), and then slow and faster decay in one direction for the next quarter cycle, and all these elements again in the opposite direction (reversal) of the forward movement for the next half-cycle. It has peaks and valleys. In essence, the sinewave is a perfect embodiment of oscillatory movements like springs and quantities like voltage. It retains its waveshape when added to another sinewave of the same frequency and arbitrary phase and is the only periodic waveform which has this property. The charges in a resistor subject to a sinusoidal voltage do not migrate elsewhere on the average. They merely slosh back and forth, so to say, over each cycle without a change in their position when the resistor was not energised. Electrostatics and circuits belong to one science not two. To learn the operation of circuits it is instructive to understand Current, the conduction process and Voltage at the fundamental level as in the following two videos: i. kzbin.info/www/bejne/ioXXpWVul5aXj9E and ii. kzbin.info/www/bejne/bnO0fpKurJeFnNE A sinusoidal voltage generator operates by separating charges for the positive half-cycle in one direction initially rapidly and slowing down and momentarily halting when its voltage is at the positive peak, and then gradually reuniting the separated charges to make the separation zero; when all charges reunite, the generator voltage is zero. The negative half-cycle now commences, when the generator operates by separating charges in the opposite direction initially rapidly and slowing down and momentarily halting when its voltage is at the negative peak, and then gradually reuniting the charges to make their separation zero; when all charges reunite, the generator voltage is zero. It then begins the next positive half-cycle followed by the negative half-cycle and the process repeats. The last frame References in video #1 lists textbook 4 which discusses these topics in more detail using a unified approach and provides an intuitive understanding of sinusoidal steady-state voltages and currents in capacitive and inductive circuits.

[@subhajitsinha98]

where are the rest of parts of the videos. parts of videos are cut off

[@veronicanoordzee6440]

They want you to pay for the rest ;-)

[@karinasan7825]

Also this video is part of a playlists. If you go to lesson two you will find the beginning of this video. Hope this helps or solves your issue.

[@theyoda55]

Question: I see phase angle described in degrees and omega described in radians in my textbook and other places. Is it just so its easier to know how far the wave is shifted, or are you actually suppose to mix the units mathematically? Or do you just convert the degrees into radians should the need arise to actually calculate v at a specific time?

[@veronicanoordzee6440]

Omega and phase angle always should have the same unit: radians or degrees. Otherwise your calculator won't understand your input and will give wrong results. Yes, we can convert between the two: 2pi radians = 360 degrees. But get used to radians, because lots of times you will see omega in the cosine-function. Omega = 2pi . f [in units: (2pi radians / cycle) . (cycles / sec.) = 2pi radians / sec.]. Why 2pi radians? Because any circle is made up of 2pi radii! Sinusoidal functions are derived from the unit-circle!

[@theyoda55]

@@veronicanoordzee6440 Thank you for responding. Now i do know about radians (I've already had to work with polar coordinates), i was just confused as to why i was seeing the phase shift written in degrees. I did finally figure out that my textbook wants you to convert the phase shift BACK into radians before you calculate it (or alternatively the omega to degrees), but i had to figure that out on my own by comparing how i calculated it vs the given answer in the back of the book. It was just frustrating b/c my book didn't state that outright. So the only reason i can gather is that the textbook wrote that way do one can read the phase shift at a glance.

[@theyoda55]

PS: It also didn't help that my professor was just like "eh, it just works." He is not good at explaining this stuff. He's a retired electrical engineer and i think he's at that point where he just knows everything instinctively, but as a result doesn't know how to explain it anymore.

[@veronicanoordzee6440]

@@theyoda55 Good to hear that. Good luck!

[@fannalis_172]

aww so I need membership to learn the rest

[@fannalis_172]

it's sad I can't learn the rest with you but thanks I learn the basics from you

[@godwincornelius201]

Thanks

[@sibonelomthunzi7089]

How can I purchase the lessons

[@MathAndScience]

You can get them all at www.MathAndScience.com Thank you! Jason

[@chethankumar1541]

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[@RezaMarz]

Thanks.

[@victorvasquez5418]

Thank you for your help Good job

[@richmondmcearly1052]

My God

[@mechanicalkiller1061]

L

[@joydivisione1420]

I hate that you cut in the middle of the video. At least finish the fucking sentence. So much greed!!

[@abdalaaldurry9801]

zet da er gewoon op pfffffffffff