Electric Circuits 2

[@PramodKumar-rn9qu]

Never seen such a cool physics teacher... appreciate this sir...thnx for explaining...

[@yoprofmatt]

Pramod Kumar, You're very welcome. Glad you're enjoying the videos. You might also like my new site: www.universityphysics.education Cheers, Dr. A

[@kabandajamir9844]

The world's best teacher thanks

[@paulio2498]

5.5 minutes in and it dawned upon me that he is writing everything backwards, this guy is amazing

[@ProDesigneHd]

he isn't writing things backwards. That's not how this board works. The board scans what he is writing and reverses it on the video

[@Pauerpleigh]

He is standing behind the glass writing forward with his right hand on the side toward him, away from the camera, the writing is in between the camera and him. The vid tech mirrors it so that we see the writing forward and him backwards (note which hand the ring appears to be on). Cool method though!

[@wayneyadams]

13:38, Avogadro's number is really number of atoms or molecules per mole (n/mole), which is how you change the moles per cubic meter he got into a number per cubic meter. (n/mole) x (mole/m^3) = n/m^3, or more simply, just 1/m^3. If you are going to do a unit analysis, you have to include all the units and cancel them correctly. Tesla's AC current was better than Edison's DC current, because the electrons only have to move back and forth (oscillate) at 60 Hz to send the electric signal along the wire. Individual electrons travel forward in 1/120 s then back again in 1/120s. Using the small drift velocity means they barely move while still transmitting electricity. Edison's DC current requires a continuous flow of electrons along the wire. But more importantly, and what makes AC so much better for power transmission is that AC can be transformed to higher voltages for long distance transmission. That means lower current, since I=P/V. The voltage drop in your car battery during starting can be easily seen when any lights that are turned on will dim during starting.

[@yoprofmatt]

Wayne Adams, Thanks Wayne, I definitely got a bit sloppy there. You might also like my new website: www.universityphysics.education Cheers, Dr. A

[@wayneyadams]

@@yoprofmatt I like the way you write every step without skipping anything, you even write the zero quantities. It is difficult to find professors who can present concepts in a clear manner and at a level that does not trivialize it nor place it out of reach of the students. I assume this is a freshman non-calculus course. This looks like the course that pre-meds, biology majors, and geology majors take. I think it is the perfect video for people who want to understand the basic concepts. Keep 'em comin, as we say in the south. ;-))

[@wayneyadams]

@@yoprofmatt based on what I have seen on KZbin, i would definitely recommend the site to my students if I were still teaching. No matter how good we think we are, it is always good for students to get another perspective on topics. Also, videos on KZbin, and websites seem more like entertainment than the drudgery of sitting through a lecture in class, so they tend to pay closer attention. LOL Wayne Adams B.S Chemistry (ACS Certified) M.S. Physics R&D Chemist 9 yrs. Physics Instructor 33 yrs.

[@rodericksibelius8472]

60 Hertz, that's a very long wavelength for one Period for 16.67 milliseconds.

[@ST-us7kq]

can you give a good books name for this subject?

[@h4z4rd28]

•́ ‿ ,•̀

[@rezafu]

is he like legit writing everything in reverse right ? sick ass foo

[@yoprofmatt]

Definitely a foo, but not that sick. kzbin.info/www/bejne/eYirfqeJg7Crj6M Cheers, Dr. A

[@miguel1437]

What's the name of the exercise book?

[@yoprofmatt]

Miguel, I was using Knight "University Physics" but you can get the same info from just about any physics textbook (including the free OpenStax). Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Dr. A

[@blakebrown7794]

Which heats up the wire, the electron drift velicityor the positive ion charge.

[@yoprofmatt]

Electron drift. As they head down the wire, they bump into atoms and heat them up. The positive charges (protons) don't move. Cheers, Dr. A

[@marcellustone]

Dear Dr. A, I noticed that you marked one section of your vids with "under construction". So I was asking myself, if there will be more vids on the subject electronics in future?

[@yoprofmatt]

That is certainly one of my goals. A full electronics series might be a while, but I'll try to get some more up soon. Cheers, Dr. A

[@johnmason2501]

Your videos rock and your "learning glass" is genius. I had problems following in calculus sometimes because the teacher was blocking his own writing (he was a great teacher, I just picked a bad seat). Also how cool would it be if your glass was even longer and you could roll it left and right. But then you'd need some way to clear it with a button or something instead of using a rag. Starting to sound and look like that computer in Minority Report. You should totally try to wave things away and shrink them with your hands...lol.

[@perrojhonxD]

How do you do that?

[@yoprofmatt]

Franco Suazo, The board is called Learning Glass. You can check it out at www.learning.glass Cheers, Dr. A

[@trentalverez6183]

Professor Anderson you are a bad azz fizzyolgist tomorrow you’re gittin 40 it should be a million smile sir y’all in my prayers ☝🏻🤨

[@yoprofmatt]

Trent, Everything you just said made me smile and laugh. Awesome. Cheers, Dr. A

[@tiffanytran4970]

Hi, can you post the numbers to the problem you did for Kirchoff's 2nd rule?

[@ayeshashakeel2094]

amazing sir..

[@arjunkbiju3636]

Thank you soo much professor..!

[@yoprofmatt]

You are very welcome. Keep up with the physics. Cheers, Dr. A

[@grahangonzales4250]

Dr. Strange?

[@ottsomchai791]

I am 63 years olds working at Lyon electric Erie PA

[@trentalverez6183]

The right hand rule KG6MUU

[@yoprofmatt]

Trent Alverez, Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Dr. A

[@Infinitesap]

Awsome

[@ottsomchai791]

12 19 2020 I am watching thanks professor