Teaching (well) is not easy! I'm still at the beginning of my journey as a teacher but I have been blessed with a couple very generous and talented mentors in that department. Great to hear from someone in Spain! Les Falles is on my bucket list and I look forward to seeing your country someday.
why do you use kirchoffs rule so ridgirous? I dont do this at all. I just use law of conservation of Charge and thus same current in serie and i will use, that in parrallel circuit the voltage will be always the same. And in series the voltage will be split (not always equally) and i will use that in parallel the current will be split as well. Then i just write some ohms law out of my mind and the rules i need also out of my mind (logic) directly in the form i need it, and then calculate all i need. If you do it rigirously you might have hard time in solving all the unnessesary equations to put it into one equation espacially if the circuit is quite complex. And if i cant identify what is series and what is parrallel i will at first structurize the plan until it works out. (in some cases, there is series plus parallel for the same resistor or whatever, but then you can always exchange this single resistor by two, one in series, one in parallel but i think you dont even have to, because in these special cases, you can apply rupe of potential difference between the ends of the special joint).
This has helped me more than my teacher over multiple lectures. I'm taking the test now and I'm learning more than I did in listening in class. I think I might get an A!
Resistors present a voltage drop when moving with the assumed direction of the current, whereas batteries present a voltage lift when moving with the assumed direction of the current. Hope that helps...
Hi, just a question: how do you assume the direction of the current in a wire. If you get a negative answer what exactly do you have to do? For example how are you supposed to know where (which wire or even which loop) you assumed the wrong current direction?
@@sadra9055 Have you watched the video? You just pick a random rotation for that part of the circuit and write the equations according to the rules he explained. After solving the equations, if the current is positive then the current is actually 'going' in the direction you have picked, if a said current is negative then it actually is 'going' in the opposite direction of the initial direction you've picked. E.g. if you have picked a clockwise rotation for the circuit and clockwise current direction, after calculating, if the current is positive then it really is clockwise. Were the value you found for the current negative then the current is actually 'going' the opposite direction so the opposite direction of clockwise is counter-clockwise
@@johnjordan3552 thanks for the reply. I know that if the current is negative you would have assumed wrong direction of current. But lets say you get a negative current as your answer, could you just change the negative sign to a positive sign and use it as a valid answer?
Watching videos after my first year of electronics engineering course, I wish I had this during that year! Explanation was perfect and it was great to have a re-cap!
Callen013 The free exchange of information is transforming our world. So glad to participate in this revolution in my own small way, Callen. Cheers from Detroit!!
final semester senior mechanical engineering student here studying for my engineering competency course. I'm graduating because of people like you!!! Thank you to all the fantastic youtube professors out there that literally made a world of difference for me during these past four years.
This is a good video. He used an example from the textbook and talked it very clearly. From the reviews of this video, I found it is helpful when I know nothing about the Kirchhoff’s Law. I found most videos are using similar problems-simple and classical. This is not bad but I hope there are more comprehensive examples displayed, because many problems in the exam are harder than the usual problems.
Damn!!!! Your explanation is so freakin' awesome. Now I get it why don't schools have good teachers..b'coz all the best ones are sitting here on the internet.Thank You so much.It was very helpful.. :)
This has been an excellent tutorial about applying Kirchhoff's laws to a real-life circuit. The presentation of the material was professional and the author did a very good job of explaining and justifying what he was doing every step of the way. Although the circuit was pretty simple, the fact that the author showed the relationship of Kirchhoff's laws to Ohm's law and power dissipation was a key feature. It would have been nice if the author was a little more explicit about when he was actually using Kirchhoff's current law and Kirchhoff's voltage law, but the viewer can probably pick it up very easily. A written out definition of the laws would have been nice too, but the verbal definition was very helpful. Overall, this had been a great tutorial and any student learning Kirchhoff's laws would benefit from watching this video.
Man this is gonna help me so much. My professor doesn't reply at all. He sometimes didn't show up. He updated grades for the TWO classes(lab/lecture and another lecture one) when there were only like 3 weeks left in the semester. He explained KCL by just saying the current going in will equal the current going out, no matter how many different junctions or w/e. Didn't explain how to calculate it or anything. Thank you for this video.
In 4 minutes, you explained this more clearly than 3 hours of assigned videos my teacher gave us to watch, and 10 combined hours of class time involving circuits. So thank you for that. Also, my teacher just gave us 35 years of AP physic C EMS problems due Dec 23 so, wish me luck. Or kill me. Either way. It's just too much to combine with a job and sports. Not to mention I'm taking linear algebra at a local college instead of a class at my high school because I've surpassed the classes they offer. So that swamps me. If anyone wonders why teenagers are so broken nowadays, it's because of things like this. thanks for the vid cheers
+BILL3 My heart goes out to you, Bill. Sounds like you've got waaaaay too much on your plate right now. (And where is the time for just messing around with friends?) All the best from Detroit!
Was here when I didn't understand the concept in High School, back again because I couldn't recall the concept in college. Both of the times wasn't disappointed. Thank you so much for this.
Dude you're the bomb. I'm in a class that goes really fast over the topics and I always feel so behind bc the examples are so advanced and complex, but you really helped me understand the basics I needed!
this is helpful i solved it first before i watched the whole video, just came here to prove if my professor is doing the right way of solving or not, and she was, thank you for this .
sorry for writing to you on a 3 year old video but I wondered even though you chose the wrong direction for current I2 was still positive why is that? you can see it at the bottom left 6:58 while you fount I1 and I0 to be negative top right and center right
Your channel is bound to quickly become a favorite for my current class. It's a shame the lessons drawn up aren't as coherent or complete as this video was. Thank you.
100-Evaluation This video has multiple benefits and points for improvement for the intent of helping students understand the concepts of Kirchhoff's laws. The video does a good job of demonstrating the solution process beginning at labeling the circuit diagram, finding a number of equations to match the number of unknowns, and solving for those unknowns. They also note their assumptions and provide asides to concepts such as the conservation of charge. Some of the areas for increased clarification would include using the wording of Kirchhoff's laws (KCL) and (KVL) to tie the marker strokes to the concepts. The author switches between methods without specifying which also leads to confusion. An additional explanation would include specifying that this is a simple circuit, DC circuit, that additional methods may be needed to solve a more complex circuit, and even that these laws only apply to certain circuits. Essentially, this video only provides a quick way to memorize a strategy without considering why it works or encouraging critical thinking.
Thanks man! My teacher is horrible at his job or hates it maybe. He "explained" too fast, and put integrals and derivative in the middle confusing everyone in class. Also prepared exercises WAY too advanced for us and if we asked if he could explain again he would get mad at us! Terrible teacher. Ugh I was freaking out about the test. You did in less than 10 min what he didn't do in the whole semester! Saved me and 39+ people in my class!
here i am little confused that for R=100 the current I1 and current I2 in opposite direction so for loop 1 , we should write 1.5v-100(I2-I1)=0 , also for loop 2 will be.... 100(I1-I2).. Right?
This is really helpful, i studied for 2 hours but i still can't understand anything, and after watching this i'm able to solve my homework assignment. Thanks a lot man, i'll look forward for your new video!
I can never understand this and I'm normally really good at physics. I mean I follow what you're doing here but when I go to do it myself on my homework I can't get the right answer. I'm sooo frustrated I hate this. And it's the last thing we're learning this year.. Of course it's the one thing I can't understand..
Electing to do voice-overs (rather than recording the audio live) has completely murdered my production rate... but having you compliment my style completely makes it worth while, A. Next video coming out soon. Been working on it for YEARS.
khairunissa naseem Nice catch! That was a mistake on my part and I'm glad you caught it. Sounds like you're well-prepared for the Kirchhoff's part of your test, Khairunissa Naseem!
Because there is no negative current flow. It just tells you the direction you imagined is not the case. It flows the opposite direction. And the power will always be positive.
Thank you so much for your instruction. Your instruction is so clear, others so confuses about the polarities thingy. Your instruction does not care much about it. Thank you so much for your clear and easy instruction.
hi mr jesse i woul like to better know how to identify loops directions because it is the base i can't go forward without knowing it thanks for your understanding i am JORDAN from CAMEROON
Ok, I have literally no idea whats going on... I applied for Electrical Eng in college next year and this video has made me change my course choices...
You are an excellent teacher! I could not understand how to do these problems until I saw this video, now it's clear as day. I had no idea when it was a voltage drop or lift, but it's so obvious now. Why can't my physics professor explain it like this? Thanks a bunch!
I grounded the bottem left corner and determined the potentials, the the voltages and then used Ohm's law and the Junction Rule to determine the Currents. I got the same answer and didn't get confused with negative signs or systems of equations.
