Parallel and Series Resistor Circuit Analysis Worked Example using Ohm's Law Reduction | Doc Physics
ฝัง
- เผยแพร่เมื่อ 3 มิ.ย. 2024
- This procedure is tedious, but it requires very little fancy math and it's conceptually beautiful. You ought to be able to look at the finished product and explain WHY the values of voltage drops and currents for each resistor and combination of resistors have the relationships they do. Yay! You can now simplify any circuit with just one battery and a bunch of resistors...or can you? Those in the know call this finding the Thevenin Equivalent circuit, 'cause the method was proven by Thevenin long ago.
Want more? This is part of a larger playlist on circuits: • AP Ch 21 - Circuits
I have actually made a bunch of physics videos. Feel free to find my other playlists if you're lonely on a Saturday night. Or if you just want to know stuff so you can begin your takeover.
![[TH] 2024 PMSL SEA GF D2 | Summer | ร่วมส่งแรงใจ เชียร์ไทยไปพร้อมกัน](http://i.ytimg.com/vi/dN2gLsCJ0T0/mqdefault.jpg)
Well I wish there was a grading system for teachers on TH-cam, paired to a function to filter by grade. This way we could immediately bypass all the wannabees, time-wasters, and just crappy instructional videos and go directly to highly efficient, knowledgeable, and entertaining instructors such as this gentleman right here. Congratulations on the delivery, you're awesome and I hope you teach for a living.
Danny MacDonald You're really nice! That would be a good system for students. Suggest it to youtube! I am a teacher by trade, in fact.
Doc Schuster
Hey Doc...do you have any videos on thermodynamics ?....phase changes, steam tables etc ?
Danny MacDonald
You bet! Check out my video index. I love thermo!
Loving Indians goes without saying! If that's not immediately obvious, you must not know any!
Doc Schuster awesome vid mate, do you have any calc vids?
You know how to begin a video.
Informative
th-cam.com/video/9AuDnKyM0r0/w-d-xo.html
It's crazy how much easier you have made me understand this topic much better and efficiently than my professor at a university did in a semester. Thank you.
I REALLY LIKE THIS GUY HE MAKES PHYSICS MORE DELIGHTFUL THANKS DOC
Far Ai it's easy as hell
So...basically...i love your teaching method. It keeps me laughing while i'm understanding and absorbing the material. It's great. I appreciate this a whole lot more now.
Thanks, man!
I was taught OHMS LAW when I was a child by my father. He wanted me to get my ham license. I've found that problems like this become so much fun to figure out. I don't get enjoyment out of many things, but this is one.
I absolutely love your teaching style Doc, hat's off to you.
Thanks for your support. I love these problems, too. You have a certain amount of freedom, but then everything works out in the end!
Doc Schuster how did u get 3? help me pls
7:14 ; he only calculated 1/((1/5)+(1/30)+(1/10)). Since the formula for calculating parallel resistors is (1/R total = 1/R1 + 1/R2; when R1, R2,.... are all parallel resistors).
So put that into a calculator and u get 1/(1/3) which equals to 3.
Similar story with me, although I was the one who wanted my ham licence. My dad happened to be a senior electronics engineer for a big company so he taught me all I needed to know. I got my ham licence at 14.
As a child i got enjoyment out of 3 Flavoured Neapolitan Ice-Cream (Choc, Vanilla, Strawberry) Covered (and.. I mean fucking drenched) in Ice magic Mint Choc topping
I mean... Ohm's law is pretty cool as well but Ice Cream in chocky topping............ Ohhh it's a bit better
This video was the switch...
That closed the circuit...
Which flowed through a resistor...
Inside the light bulb...
Over my head.
At least as far as the equivalent resistance in parallel resistors is concerned! ;) Thank you so much for the help Doc!
David Porter HA! Glad it helped!
I have to say, this is the best explanation of circuits I've ever watched. I'm a senior in AP Physics right now and I've been struggling to understand what was even going on, and this video broke it all down so that anyone could understand these complex problems. Thank you a lot and I will be sure to recommend your videos to all of my classmates who may be struggling.
Thank you so much for this video. My AP Physics teacher is terrible at explaining things and not a friendly, helpful person to go to for help at all, so I've been trying to learn the concept on my own. I haven't been able to grasp it until I watched your video so thank you for posting such a wonderful study aid.
Omg ur hot
I am watching this video at 3:17 am for my final this morning at 9, and this guys enthusiasm kept me awake the entire time, and trust me I never stay awake during any of my profs lecture, they bore me to death
You are the only academic youtuber which i can actually sit through and watch a video that is longer than 10 minutes, and actually learn what I came here for plus more. Thank you SO much!
Learned more in the 24 minutes that it took me to watch this video than I did from my professor this semester. Thank you.
I live in England and couldn't find and useful videos from over here to help with physics but this helped so much, thank you.
this 24 minute video has taught me more than all of my lectures on this subject combined. Thank you so much!!!!!!!!! now time to cram for this test in two days
i learned more in these 20 minutes than what the teacher in zoom tried to teach for 3 hours
ive been stumped by this for days and now i think i know why i wasnt subtracting the voltage drop from the total voltage thanks! you explained this way better than my shitty textbook.
Thank you so much! I'm in my first year of engineering and have a test coming up and you just made it so much clearer! We need more people like you!
This was super helpful man! You're a way better teacher than most who work in high schools! Thanks a ton
Thank you! I appreciate your feedback, and I will keep posting!
Making the simple stupid. This gentlemen has the gift of communication. He is capable to communicate with everyone at every level, and not only with the genius. A teacher is supposed to communicate like this; Bravo.
Steps are clear and easy to follow. Awesome teacher!
This was so helpful. My professor did a similar problem in class but left out a lot of the explanations. I am so glad that I found this video.
I have been watching many of your physics videos lately, and I just wanted to say that I appreciate what you are doing. Thanks!
I wish teachers wouldn't take things so seriously, and be more like this guy haha
So we're not gonna talk about that beautiful blue marker?
+mylobage let's discuss it over the next few weeks
+mylobage thats just a regular blue marker under a crappy camera
Great Video, Doc! wish more teaching was done like this :)
It's 2021,i have physics final next week and this is the only physics channel i enjoy watching
This is the first time I've ever understood what voltage drop was and what stayed constant when solving for voltages and currents. Thank you so much!
13:34-13:36 From deadpool to batman in just 2 sec! This guy is the real deal!
OMG....this is soo funny!!! XD
i really liked his videos so much that i started watching all his videos.his teaching method is really helpful. before watching this video i saw a lot of videos bt i was not able of understanding this bt after watching this i became skilled in this and i could even help my frndz in their probs.thnx 😊😊
You have singlehandedly saved the day! I really understand the differences between series and parallel circuits now! I appreciate your time and effort of this video!
I love your confidence and the personality that your using to teach. If at least half of my professors were like you i would be able to enjoy my college life and academic progress fully.
I enjoyed this and understood it much more now than I did back in physics class
You are amazing. Thank you for teaching me what my professor could not.
Ashtyn Greenstein sure #InterestingElectrical
What a fantastic, no brilliant Web site. made out to be understood. You can be our teacher anytime.
I'm in apprenticeship studying electrical engineering with no idea at all but this video helping me a lot...thank you so much for sharing your knowledge
You are my hero. My physics teacher just cannot explain so thank you.
Thanks, Anne. I hope I can live up to your expectations!
Omg ur hot
Thanks for well explanation about ohms theory
The answer is you should never talk to strangers!
ఢ
,.
This video has heed me so much, I think i've seen it 5 times over the course of three years now. I am so thankful for its existence.
I'm taking Physics 2 in college and I cannot be more thankful for your videos! You make physics fun and exciting! Thank you for putting so much useful information, concepts, and approaches in each video!
MATE!!!!!
You made it so easy to understand :) always struggled with this. but thanks to you I think I can find my way around it.
Cheers...
you have taught me more than my physics teacher wow thank you so much
You're infinitely better of a teacher than my college physics professor. Thanks a lot!
The Moon Babies Did you divide by zero? That's more of an insult to him/her than it is a compliment to me. But..thanks?
By far probably the best tutorial I ever came across. It was to the point, and clear. Thanks!
His voice sounds like deadpool.
EXACTLY WHAT I WAS THINKING
Im actually learning! trying to study for my advanced ham licence and its difficult making sense from just reading notes. Keep it going Doc! Thx
ham???????????????like the food
ham radio
Lasagne? Like the food?
+Artimis Fowl amateur radio...HAM
Long-time student here, this is a great video. I still always appreciate an entertaining and engaging presentation of concepts, and you nail it. Thanks for offering such a great service, and your students are very lucky to have you!
Just from hearing you say "for resistors in parallel the voltage is the same, and for resistors in series the current is the same" I think I could audibly hear the penny drop... Thanks so much Doc!!
this was such an excellent video, thanks a lot!
You are an excellent teacher!
Thanks, yo. I try my best, anyway.
I started in electronics somewhere around 1968. I do ok at Ohms Law but this guy is really good at explaining the basics and it is easy to watch and understand. Sir you get A+
Probably one of the most thorough problem explanations I've ever seen. Bravo Sir, Bravo.
I did one! Just make sure you search with Kirchoff (two f's). Thanks for your support! Enjoy.
Thanks a lot mate:) you actually make physics so fun.
I love it! I'm glad you're having fun, too.
Doc Schuster
Unfortunately my homework still doesn't make sense to me. However since I only have to combination circuits like this for extra credit I'm not worried.
This video is by far the best I've seen for circuit analysis !!!!!!!
Never had such a beautiful Sunday morning learning so much of V=IR in one short 24 minutes lesson, and clears so many niggling confusion. By far the best video lesson. One dollar? Still don't mind, it's a valuable dollar. Better than the fees one pays for some courses. And not forgetting to mention that this video is almost 8 years old. 1.4m views.
I wouldn't do all that for a dollar. It would have to be at least a dollar fifty for it to be worth my time!
so much work for a dollar :/
Vorrtekks These are hard times!
lmaooo, ikr keep your dollar
He didn't get the dollar. It took him longer than the allotted 15 minutes.
That was money well earned, especially for the knowledge given! Digital Dollars!
Well can be done in 2-3mins *MAX* if you know the concept be4 hand
Thank you so much for this clear, concise approach to a concept I continue to struggle with. Also, your color coordination made the biggest difference for someone who is a visual learner. Please keep using that system. Way to go Doc!
I wish I had a Physics teacher like this guy. We had suckers back in the day. Full marks for the delivery
You are so funny! This video helped a LOT, thank you
I'm glad you liked it!
this was really helpful, thank you so much. may God bless you.
This is literally the first time I wished there was a 5 star rating system on TH-cam cuz this guy deserves waaay more than a sub and a like
Doc i have a test tomorrow on series & parallel circuits and so far the video has helped so much with my understanding on the subject. I really appreciate you making the video
Dei valor sim ;)
lost it at anarchy meter - what would be unit of measurement for such a device?
+Steve Smith Probably # of fucks given?
+Steve Smith probably some derived unit of human entropy/stability.....don't ask how that would be measured
Watched multiple videos before this one and none of them worked but this one did, you did a really good job on this, even though it was seven years ago, thanks.
I know it's 7 tears old but amazing video, thank you! This helped me out tremendously with senior high school physics during online learning in this pandemic. Entertaining, very easy to follow, well articulated, and aesthetic. Couldn't have asked for any better!
I would have ended the video with a dollar smacking that table! BOOM!
***** That's a solid ending! I should ask you to design the punchlines for my videos!
haha...sure. I was waiting for that dollar to come out, but it never did :-(. Your stories make the videos more interesting.
you dont need a calculator to calculate that its 1/R= 1/ (1/5 +1/30 + 1/10) now you introduce a technique called common divider , its the biggest divider , for this case its 30 ..like this 1/R= 1/ (1/ 5 x6 + 1/30 +1/10 x3) = 1/ (6/30 +1/30 +3/30) =
1/ (10/30) , so you can delete zero's and it looks like this
1/R= 1/(1/3) now 1/R = 1/1x1/3 , 1/1 x 1/3 = 1/3 so its 1/R=1/3 , now you can delete 1/ cuz its on both sides and what you are left with is R=3... only thing you needed there is a technique called multiplying by common divider , essentially to make numbers even you find the common divider so that you can add different dividers like
1/2 +1/4 + 1/8 its the same thing as 4/8+2/8+1/8=7/8 ... judging by the numbers used and how they all add up nicely i suppose you are meant to use that technique.. i was never good at math , i failed badly finel years exam , but at least i know how to add up those numbers without calculator :) i didnt even know that i still remember doing that in school
Cray cray
I did physics 40 years ago. An excellent 1st class recap. Got it in one!! Thank you.
Thank you soo much ^^ .. My grade 12 physics teacher sucks at explaining. Finally understood the voltage drop concept.
You are my college physics lecture. Bless you
rob b meh, people suck in general, let them do it however they want
This video made me more confused than I already was
This is just a worked example. You should watch the one called series and parallel DC circuits intro - it might help.
@@DocSchuster . Mn
Thank you so much, Doc! This will hopefully save me for my test tomorrow. Learned far more in this 24 minutes than in 90min in class.
You are a great teacher! Love your enthusiasm and how fast you were.
ॐ om mantra chanting soothing voice
th-cam.com/video/CLEd_i0yQ9A/w-d-xo.html
10:54 the principle of diarrhea!
I swear you have explained such things that my professor never explained!!!
can i just say thank you so much. i have been trying to find videos to help me with circuits and how they work and the calculations fit and im grateful i found your channel
You're hilarious.
you didn't solve in 15 minutes :P
tick tock. That is based on the murphy law of statement v. minimum practical outcome degeneration. Wherein a 15 min problem = 22.5 minutes to solve. A simple 1.5 : 1 ratio is applicable as the reality laden expected outcome v. original statement.. Another example would be like a half hour lunch break will always take 45 minutes. (30 x 1.5 = 45) This equation was originally formulated by murphy while he was having a good day, the ratio may actually have a weighted outcome value averaging of 2.7 : 1. Wherein a 15 minute problem will take 40.5 minutes to solve. The plus side of this is it is ok for your half hour lunch to take 1 hour and 21 minutes. Ex: 30 x 2.7 = 81
See how critical thinking skills will help you in your day to day. : )
Terry Lang
It is most excellent to have a name for my temporal failings!
Doc Schuster We all work against the clock...Doc. I'm with ya, not against ya. I hope you're not using (Terry Lang), as the name...hmmm. I meant to prove that by making up that rhetoric concerning Murphy.
But seriously, Doesn't every 10 minute project take 27 minutes ? LOL
"Murphys Law of Statement v. Minimum Practical Outcome Degeneration."
personally, now, after saying it for the second time. I like it. : )
Doc Schuster
I've done some more real heavy thinking : / on this, and I will not surrender this to Murphy. I copyright this written law as Langwich.
A term derived of My name, language , languish, and a sandwich.
Langwich, pseudo intellectual property of Terry Lang 2014. now it's legal. ; )
Nice. Now I'm wondering what type of sandwich was on your mind that could be worth a dedication.
Doc Schuster? More like god Schuster. Thanks for saving me on my physics exam king. You’re a real one
Thank you for appearing in my feed before my GCSEs 🥺
All i gotta say is, what a waste of paper. Next time, just flip it over!
good video
the paper blots. marker pen,.
I’ve taken tests and failed them, I was trying to do the biggest equipment’
Until I saw ur videos, you took me to the smallest thing I can imagine’ ah resistor. Thank you so much, u were born to teach.
My dude, I've been locked in my room for a week just trying to piece it all together. You're a lifesaver. Keep up the awesome work bro
lmao anarchy meter..
How did he get 3?
bmx4lif3 Add the 3 resistors by 1/R1 + ... then the answer will be 1/3, reciprocate it = 3. Yay
bmx4lif3 if you want it even simpler,
i'll do it in steps so you can tell me between which 2 steps you can stuck on , if you do get stuck.
here we go
Step 1.the Resistors are 5 ohms / 30 ohms / 10 ohms right ?
Step 2, we use the formula
1/5 + 1/30 + 1/10 = 1/total equivalent series resistance
got that ?
Step 3. put your calculator away (Kids of today are lazy) Let's do it manually.
you see if you just punch this into your calculator, you'll come up with 0.2 + 0.033 + 0.1 = 0.333 and you'll still be like... wtf
so, MANUALLY OK
if we have 1/5 + 1/30 +1/10
we take the largest denominator and we leave that unchanged.
so 1/30 stays as is
Step 4. now we take 1/5 and we look at the denominator....
what do we have to do to get 5 to 30 ?
well.. 5 x 6 = 30
therefore 1/5 = 6/30 right
Step 5. now do that for the 1/10
so 10x3 = 30
so 1/10 = 3/30 right
Step 6 so now we have changed this
1/5 + 1/30 + 1/10
to
6/30 + 1/30 + 3/30
is that much easier to solve now
so what's 6+1+3
10 right ?
Step 7 therefore 10/30
now you can get your calculator out and type that in as 10 divided by 30
and you'll get the answer 0.33333333333333
or you can simplify manually 10/30 (fuck off the zeros on top and bottom)
and you get 1/3 and then punch that into your calculator and you get
0.33333333333333
whatever tickles your fancy.
Step 8. ok, SO HOW DID HE GET 3 (After all this typing we want to know.. right?)
well we have 1/3
to get the reciprocal we flip it, so it becomes
3/1 is that clear
Step 9. DO THIS MANUALLY
what's 3 divided by 1
3 right
don't believe me
get your calculator out and punch in 3 / 1 LOL
(Bloody calculators making people lazy)
AND THAT'S HOW HE GOT 3
PS, if you want to know my beef with calculators, it's this
in high school back in around 1987
i forgot what 8x8 was, was it 63 or 64,
it was a headfuck for like 6 months.. yes 6 months, why
because at the beginning of year 10 and prior i was awesome at maths
then we got calculators, or should i say we had to buy them
CASIO FX100 Scientific Calculator
ithen got good and fast and punching shit in to a calculator
THAT MADE ME LAZY
6 months later i realized what it had done and i put the calculator down and reverted to the old ways of the force LOL
WANNA TEST YOUR CALCULATOR GUYS
DO THIS
1. first work out
1+1 x 6 (in your head manually) this shouldn't be hard
2. if you said 12 (go and learn order of operations again)
no it's not (1+1)x(6)=
simplified to 2 x 6
FYI, for those who don't know
MULTIPLICATION AND DIVISION COME FIRST
so the way you work it out is...
(1)+(1x6)= simplified 1 + 6 = 7
now that we know that the answer is 7
punch it into your calculator
if you get 12 BIN THE CALCULATOR
if you get 7 Your calculator is good
See Calculators can be decieving
now, i actually spoke to the calculator manuafucters of these chinese cheap shit calculators
there response was as follows:
"sir, the calculators are programmed using sequential mathematics, it's the responsibility of the user to know order or operations"
now even though i agree with that
let's be real about this
if you are working out the total of something like
354 + 256 x 32 / 5x 64 + 456 x 32 - 7 / 3 x 6 =
hands up who gives a fuck to sort all that shit out before they punch it into your calculator
i don't know about you guys , but ever since i was at school and we used a calculator the idea was
accuracy and speed
to say to someone they need to sort it before they punch it into a calculator defeats the purpose of the calculator
and let's say YOU ACTUALLY TRUSTED THE CALCULATOR COMPLETELY
and have never read my post and you did the above calculation
HERE'S THE DIFFERENCE
Scientific calculator (applying order or operations correctly)
Answer = 119,789.60
Cheap Shit sequential Mathematics calculator
16,019,953.99
119,789.60
16,019,953.99
Big Difference huh
see my beef with Calculators
AND THIS IS WHAT PEOPLE TRUST
FYI
i think any Scientific Calculator is fine
Most Smart Phones (in Standard Mode) are fine
Windows Calculator (basic Mode = Bullshit)
Windows Calculatrs (Scientific Mode = All Good)
Excel = no problems
Using Databases like MySQL for calculation = no problems
the way you can tell is if
YOU ENTER 1 (it should display 1)
if you enter + it should still display 1)
if you enter 1 again (it should display 1)
NOW HERE'S THE BIT TO WATCH OUT FOR
When you press the +
if the calculator adds the running total, throw it away
if it waits until you pres = then it's good
Now that we have all that out of the way
Hopefully there will be no room for error.
be cool
+Martin Andrew Marc Ben
Cool Story dude, can't believe you actually carried out your own investigations and questioned a calculator manufacturer. And learned how to evaluate the decency of a calculator (i still have my BODMAS theorem and 12x table in check, everything else i admit, i use the calculator!)
Jeremy Kua LMFAO, BODMAS, wow, i almost forgot that, thanks mate for reliving a memory that was about to wither away forever, i mean , i obviously know how it works, but the mnemonic BODMAS, i'll admit, i haven't heard since the 80's
cool.
as for my investigations.
fucking oath i did ,
when you go to a $2 bargain shop and there's a calculator and it's wrong in basic math.
and the little asian lady stands there ,and you tell her, this calculator is wrong, why should i pay for it, and she says..... Too Dolla, you want to buy.. Too Dolla
she doesn't give a fuck if it's wrong or not
she want's her $2
all while kids in high school who have enough pressure as is, sit there and wonder why they can't figure out basic maths and why they are getting low scores on the exams
and then they are made to feel stupid after the exam
and the teacher won't bother to bring it to their attention. (as i was informed a little while back)
for christ's sake, THEY ARE A TEACHER, their function is to "Teach"
if one of their students isn't doing well, you would think they would correct the mistake.
guess not !
so..
of course i called the manufacturer,
they have a responsibility for accuracy
Same as.. let's take dyson
Claiming they have a Digital Motor
LOL
which uses CINETIC Technology
Not KINETIC (Because they couldn't patent "Kinetic")
if you wondering
yes.. i also called dyson and spoke to their engineers
and they agree that the motor is not power by digital information or digital power
it's merely digitally switched
as for CINETIC
it's a marketing tactic
and as for the motor being as fast as a Formula 1 Car
Again, marketing bullshit
(Technically the RPM's are as fast, but obviously the mechanical advantage is not there and you can't just whack a dyson vaccuum under the hood of your car and instantly have a formula 1 engine
even though that's what i was told by idiotic sales people who are actually told to believe this shit when they are selling it to you.
there's another one for you.
bottom line, i don't like bullshit
and i pride myself on accuracy.
be cool dude.
+Martin Andrew Marc Ben
LOL, "Digital Motor" and "CINETIC" seriously?? Sounds like your mathhood were full of scammers.
Right, keep the calculations coming
i love the way you teach. i wish all teachers are like you
And then... In only 24 minutes and 5 seconds. Everything I have been learing in physics for the last week or so was explained... You my friend... Are amazing... Your a great teacher! Thanks a ton for your help!
i srry u didnt get ur dollar bc u went over 15 mins
Why waste my time for one freaakin dollar
I have never understood Ohm's Law like this. I can't wait to go back over the notes taken from your video. Thank you.
Thank you very much. I have been struggling with these types of equations for awhile now. You explained it in simple terms I could understand. You rock
never understood ohms law, until I watched this video.
Thank You Doc
Thank you for finally making this concept click for me. Really great job!
Awesome!! .. you explained this the best, and I have looked at a whole bunch. Having experienced perhaps the worst teachers on earth, you have restored my faith. Thank you for being a fantastic teacher!
Amazing explanation! You covered multiple topics very well, over a short period of time!
Can't thank you enough. Have a test over this stuff tomorrow and had no idea how to solve these until I watched this video. Very well done!