The perfect channel for last minute revision... I have my exams tomorrow...Oops! I mean today (it is 3:20 in the morning). You've been a great help. Thanks :)
How relatable. It's 3:55 am right now. It's funny to see how this video is seen around the same time each year for each generation of physics students. Now I am just procrastinating more, peace!
I am taking Calculus based physics II in college and I have to say man, you have been a big help to me. I am not doing so well so I hope that these videos break down these concepts so that when I read and go to class it will make the learning easier. Thank you man. Keep doing physics problems. I go to Mississippi State University and our physics department is one of the roughest departments in the U.S. Your great!!!
Despite the fact that I have a fantastic E&M professor, sometimes it's just hard to find an equally great explanation/review. You did a great job with this, and it really cleared up my readings! Thank you!
I found this kind of confusing at first. By "amount of change" I thought you just meant the total charge. You did mention "charge carrier density" once, but you should write it out too because it's a completely different unit. For clarification: Charge carrier density means charge carriers per volume, charge density means charge per volume. Multiply charge carrier density by charge of a single charge carrier to get charge density.
Wow, i am surprised your channel does not have too many views. I am 14 and i am interested in science and i have learned alot from your channel. thanks and keep up the good work
Each electron or proton has a magnitude of charge equal to 1.6e-19C. If you have Avogadro's number of electons then you have 6.02e23 electrons. To get that charge multiply the two above numbers together.
This doesn't add up. n*A*v*q means you multiply these units: [number]*[m*m]*[m/s]*[C]. So, you should end up with something which is measured in [m^3*C/s], however current is measured in [C/s]. So, where does m^3 goes to?
hey dude, i am a little confused with average and instantaneous current. They both seem to be represented by the same thing change in charge per change in time??
Is charge density equal to the number of charged particles per volume or the total charge per volume? Also, are you using "q" as the charge per charged particle?
I don't think that he meant charge density by n. It's the amount or number of charge per unit volume and its unit is m-3. But in case of charge density, its unit is Cm-3.
You should have gone one step further in the end and expressed n*q as rho (charge density) so that current density is the product of charge density and velocity J=rho*V.
@lasseviren1 This created more questions than answers for me. If Amps are measured by the amount of coulombs per second, and the charge carriers are the electrons, then if i raise the amps, then it would take the other side of the circuit hours to receive the power. Or is it that the positive flow is what creates the power? And if so, wouldn't that make amps,as a function of electrons per sec the wrong way to measure power? Or is it that we measure this positive force because its the real charge carrier, and we just say is electrons as to not upset the apple cart? I think the potentials are what is "real" hear. not the charge carriers. please advise?
No it wouldn't take hours to receive the power because the electron on the wire are already there, so as soon as you plug in the circuit these electrons starts to move, making the current flow straight away
kandysman86 Electrons seem to move like marbles in a small tube. Push one on one side of the tube and another marble/electron (some distance away) falls out at the other end of the tube.
جوجل ترجمة جيدة للحصول على اللغة الإنجليزية للغة العربية ثم تقطع والسؤال المحبط في اللغة الإنجليزية واستخدام مترجم جوجل لتغيير اللغة الإنجليزية إلى اللغة العربية لقراءة الجواب.
The perfect channel for last minute revision... I have my exams tomorrow...Oops! I mean today (it is 3:20 in the morning). You've been a great help. Thanks :)
+Ananya Roy SAME
Same.
same
How relatable. It's 3:55 am right now. It's funny to see how this video is seen around the same time each year for each generation of physics students. Now I am just procrastinating more, peace!
@@jfoconn How was your exam?
I am taking Calculus based physics II in college and I have to say man, you have been a big help to me. I am not doing so well so I hope that these videos break down these concepts so that when I read and go to class it will make the learning easier. Thank you man. Keep doing physics problems. I go to Mississippi State University and our physics department is one of the roughest departments in the U.S. Your great!!!
Just want to thank you for making this look much easier than all books and notes that I have. You are the MAN!!!!
Despite the fact that I have a fantastic E&M professor, sometimes it's just hard to find an equally great explanation/review. You did a great job with this, and it really cleared up my readings! Thank you!
much clearer than the textbook, thanks!
This was excellent, thank you, especially the visualisation. no need for fancy graphics
I found this kind of confusing at first. By "amount of change" I thought you just meant the total charge. You did mention "charge carrier density" once, but you should write it out too because it's a completely different unit. For clarification: Charge carrier density means charge carriers per volume, charge density means charge per volume. Multiply charge carrier density by charge of a single charge carrier to get charge density.
Thank God that I read your comment. I was trying to solve a problem and got the answer wrong. Thank you for making it clear.
Ohhh that is what it makes so confusing
Basically n=#electrons/V
Wow, i am surprised your channel does not have too many views. I am 14 and i am interested in science and i have learned alot from your channel. thanks and keep up the good work
u 22 now
@@armuhammad2148 He has a whole degree by now lmao. Crazy how time flies
@@nero3901 do you have a degree now also?
@@nero3901 thats crazy man
Super explanation with correct reasons
Awesomeeeee👍👍👍👍
Very simple explanation of something which seemed so difficult.Thank you so much sir!
You can find all these videos apphysicslectures(dot)com .
UR AWESOME!!!!! I CANT THANK YOU ENOUGH FOR THIS VIDEO!!!
man you RULE.. you explained all these stuff great!
In my physics book rho is the charge per unit volume and n is the number density of carriers. Not sure what the difference is, but it says rho = nqVd
Cheers. Most of my immediate worries were solved in 10 minutes!
It´s Great!
Great tutorial on current density in terms of drift velocity. Thank you!
Now you are 22
Thank you! That was really helpful!
Perfect explanation. Thanks.
Thank you so much for these videos! It has helped me so much!!!
Thank u very much for an awesome explanation sir. 2 thumbs up
Great video! but needs more "choonk" s
thanks... this site really helpful for my studies in Electromagnetic Theory course... ^_^
Thank you for this explanation.
You didn't explain current density that well but the rest was excellent and easy to understand.
Thanks a lot sir. its was very easily explained in our book this topic is just mess.
Very nice! But in physics most of the time Density = some quantity per cubic meter.
In current density: Why current flowing per unit area is always perpendicular to the direction of flow?
4 hours until the exam and I’m still cramming
Im very sorry to correct you, but by the dimensions the unit should not have plural and they should not have short forms (coulombs, sec)
u save my life bro thank u so much
What is charge in terms of Avogadro Number..??
Each electron or proton has a magnitude of charge equal to 1.6e-19C. If you have Avogadro's number of electons then you have 6.02e23 electrons. To get that charge multiply the two above numbers together.
@@lasseviren1 Ok.Thank you so much. 💚
This doesn't add up.
n*A*v*q means you multiply these units: [number]*[m*m]*[m/s]*[C]. So, you should end up with something which is measured in [m^3*C/s], however current is measured in [C/s]. So, where does m^3 goes to?
did the videos actually help you in the class?
Why do we need to define a new term called charge density?What is its benefit for us?
Easily explained. Thanks.
hey dude, i am a little confused with average and instantaneous current.
They both seem to be represented by the same thing change in charge per change in time??
Is charge density equal to the number of charged particles per volume or the total charge per volume? Also, are you using "q" as the charge per charged particle?
The answer to both of your questions is yes
I don't think that he meant charge density by n. It's the amount or number of charge per unit volume and its unit is m-3. But in case of charge density, its unit is Cm-3.
you are god, thank you so much
Thank you so much cos you're a pro
Is current density a fundamental quantity?
I swear that it is ASMR to me
Sir how to set camera
You should have gone one step further in the end and expressed n*q as rho (charge density) so that current density is the product of charge density and velocity J=rho*V.
@lasseviren1 This created more questions than answers for me. If Amps are measured by the amount of coulombs per second, and the charge carriers are the electrons, then if i raise the amps, then it would take the other side of the circuit hours to receive the power. Or is it that the positive flow is what creates the power? And if so, wouldn't that make amps,as a function of electrons per sec the wrong way to measure power? Or is it that we measure this positive force because its the real charge carrier, and we just say is electrons as to not upset the apple cart? I think the potentials are what is "real" hear. not the charge carriers. please advise?
No it wouldn't take hours to receive the power because the electron on the wire are already there, so as soon as you plug in the circuit these electrons starts to move, making the current flow straight away
kandysman86 Electrons seem to move like marbles in a small tube. Push one on one side of the tube and another marble/electron (some distance away) falls out at the other end of the tube.
thank you, great job.
u alive?
nice video thx a lot!
it figures out all my question!
I m wathing it in 2018..
you're the best
why do they have to complicate things in the book this was like sugar in my morning coffee
Thanks
watching this at 1.50 am
Great video bro.... Keep it up.....😃😃😃
Thanks 😆💟
thank you 🤍
KANSEI DORIFTO??!?!!!?!!??
Man, is this a Physics level to you? I have lived and loved the US with all my heart, but you've got to do something about your educational system.
Alessandro Garzelli 🖕
Thanks sir
@Jameszhangdude yes i see, thanks for the response
is current density equal to drift current?
awesome thanks
thx mike!!!
so helpful
مع اني لا افهم الأنجليزي لاكن وضحت لي الفكره افضل من معلمي
جوجل ترجمة جيدة للحصول على اللغة الإنجليزية للغة العربية ثم تقطع والسؤال المحبط في اللغة الإنجليزية واستخدام مترجم جوجل لتغيير اللغة الإنجليزية إلى اللغة العربية لقراءة الجواب.
thanks !!
5:57 oops
Who else has a test tomorrow
:)Thank you
thank you!
Brah