Voltage Divider Circuit Explained!

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6 жыл бұрын

This physics video tutorial provides a basic introduction into voltage divider circuits. It provides a simple formula to calculate the voltage across a resistor in a series circuit with two resistors in series with a battery. it contains plenty of examples and practice problems. It discusses the effect on the output voltage of a voltage divider circuit when a load resistor is placed in parallel with R2. It discusses how to design a voltage divider circuit to meet certain requirements.
Schematic Diagrams & Symbols:
• Schematic Diagrams & S...
Resistors In Series:
• Resistors In Series - ...
Resistors In Parallel:
• Resistors In Parallel ...
Series and Parallel Circuits - Light Bulb Brightness:
• Series and Parallel Ci...
Equivalent Resistance of Complex Circuits:
• Equivalent Resistance ...
How To Solve DC Circuits:
• How To Solve Any Resis...
_________________________
Current Dividers:
• Current Dividers Expla...
Parallel Circuit Challenge Problem:
• Finding The Current In...
Kirchhoff's Current Law:
• Kirchhoff's Current La...
Kirchhoff's Voltage Law:
• Kirchhoff's Voltage La...
DC Circuits Review:
• Series and Parallel Ci...
____________________________
KCL and KVL Circuit Analysis:
• Kirchhoff's Law, Junct...
Thevenin's Theorem - Circuit Analysis:
• Thevenin's Theorem - C...
Norton's Theorem - Circuit Analysis:
• Norton's Theorem and T...
Superposition Theorem:
• Superposition Theorem
Maximum Power Transfer:
• Maximum Power Transfer...
Physics PDF Worksheets:
www.video-tutor.net/physics-b...

Пікірлер: 204

@TheOrganicChemistryTutor 6 ай бұрын

Final Exams and Video Playlists: www.video-tutor.net/

@Ks.Kamcam 5 жыл бұрын

Dude this guy teaches everything I am so astounded. I remember trying to get help for chemistry, then some for calculus, and he is even here in an electrical system and circuit lesson. What can't this guy do?

@JUDGEME5150 4 жыл бұрын

Ya this guy is a complete beast

@saquibkhan396 4 жыл бұрын

And he does it brilliantly

@youtubeshorts3711 4 жыл бұрын

He can't excrete stuff and take it back Guarantee 💩💩🤯🥶

@DasAntiNaziBroetchen 3 жыл бұрын

@@youtubeshorts3711 lmao

@Wishfull171 3 жыл бұрын

Haha same I’ve used him for all of these. Great dude

@changofaceanimations5402 Жыл бұрын

How is it possible you've literally been teaching me everything???

@herminigildojakosalem8664 4 жыл бұрын

Am I glad I found this video. I find it refreshing for it to bring me back to the basics. Thank you JG!

@benblackburn8725 2 жыл бұрын

I've been watching these videos for years I really appreciate the great work you do!

@shreyashah4040 4 жыл бұрын

Orgo tutor teaching me physics---- absolutely brilliant!!!!

@markj3851 4 жыл бұрын

This video series is awesome! Very specific and helpful problems for real world examples. Thank you for sharing.

@ClownWhisper 2 жыл бұрын

Really is it awesome? What resistors did he use in his first example? He just puts 10 and 20 are that doesn't tell anybody anything

@pumbo_nv 5 жыл бұрын

Wow! Before watching this video I watched and read many other tutorials on voltage dividers, but still was confused and had many question. Now I finally understand. Thanks.

@pumbo_nv 5 жыл бұрын

Though you didn't mention practical examples of voltage divider usage

@chaparritabrown8187 3 жыл бұрын

Thank you so much for this class i got it now keep the good work teacher

@killakuri9428 6 жыл бұрын

please also add something about Thevenin theorem

@faithfulliew 2 жыл бұрын

from confused to confident, I am grateful for your help!

@ugwuokeemma2226 5 жыл бұрын

Am getting it together here,,God bless u sir

@crastydebellary5100 3 жыл бұрын

Best tutor ever. Deeply explained for better understanding. Thumbs up👍👍

@phoebeplayz8381 Жыл бұрын

I love this guy :) can y'all watch the ads completely the only way to support him.thanks

@jermainemartinez9298 3 жыл бұрын

Bro u are a lifesaver thanks a lot man. Have a nice day

@normandevera9088 5 жыл бұрын

Lagi akong nanunuod ng mga posted video mo, salamat ( I've always watch your posted videos, thankyou) ☺

@lowkeycam9151 Жыл бұрын

YOU MADE THIS LOOK SO EASY TYSMM!

@gordthor5351 5 жыл бұрын

You are an excellent teacher. Thanks.

@xorpe7172 2 жыл бұрын

At 17:53, does he know that the voltage around R2 is 3V due to the fact that the device needs a voltage of 3V and voltage is the same across parallel branches?

@PaulSt-Germain-c7u 5 жыл бұрын

You are awesome. Finally I understand. Please make a video of problems of strain gauge.

@general_prodigy 5 жыл бұрын

aw jeez you explained it far better than my physics teacher

@peacennaji7545 4 жыл бұрын

Thank you sir. You are just so good.

@bardia8225 3 жыл бұрын

at 11:43 , the voltage calculated to be 9.52, that's across the two parallel resistors right? So the voltage drop across R1 is 11.48 since 20-9.52=11.48 right?

@johnwriterpoet1783 5 жыл бұрын

The largest resistor in the voltage divider will drop More Voltage. That resistor can get very very hot! So watch your power rating of that resistor.

@isaacjohnson8752 3 жыл бұрын

Good video. I feel that the wording in the outputs voltage and amperage is deceiving. You can get a fixed voltage using this method but the amperage through the output of our new source will depend on the resistance of the load. I think the wording would be better if you stated that the circuit without the load connected in the voltage divider would be (blank)mA

@vincemohamad3380 3 жыл бұрын

according to kvl, the voltage exiting the circuit should be 0 but at 4:08 you said that the voltage output is 6v. Should not 6v be between R1 and R2?

@afrozfaria5691 3 жыл бұрын

Why is his voice so *SOOTHING* ?! 😍

@tito51rivera15 2 жыл бұрын

You all the tutorials so easy....even with the math in between.. Thank you

@SnoozeDog 5 жыл бұрын

For #5 how does he know that R2 should be approx 100times less to get 3V?

@HeySorz 4 жыл бұрын

The bigger the internal resistance, the closer it is to the original output voltage. The internal resistance, as he stated, is recommended to be at least a hundred times more than R2.

@Imkicelee 4 жыл бұрын

Universal Narcissist what about if the internal resistance wasn’t as big?

@filiphotti 4 жыл бұрын

@@Imkicelee it wouldn't be as close to 3V. If R2 was 5000ohms the total R would be: (1/5000+1/5000)^-1 + 15000 = 17500ohms, wich means the voltage out is: V in * (R2/R1+R2) = 12 * (2500/2500+15000) = 1.71 V and not even close to the 3V we wanted.

@niranjanreddy2637 5 жыл бұрын

If a ckt contains r1,r2,r3,r4,and ,r5 resistors then what resistor value we used as numanetor

@PipenFalzy 4 жыл бұрын

When I have 20vt, and know vo is 12v that tells you to get r1 is 8v (20v-12v) x .05a is 160 ohms. r2 = 12v /.05a =240. You seemed to do more work to get the same answer.

@mikeatlanta9306 3 жыл бұрын

Thanks for this

@rabecamohammed9518 2 жыл бұрын

@10:51 Why is the numerator Req? If we're finding the voltage across the device, shouldn't the numerator be just 1000 Ohms (resistance of the device)? Similarly, if we were to find the voltage across R2, shouldn't the equation be vout = vin ( R2/R1+R2+R3 ) and not vout = vin (Req/Req + R1)?

@revathyjothilingam187 3 жыл бұрын

0. Construct a dual potential divider circuit with a common voltage source as supply. The potential drop should produce an output which is 5 times greater than the cut in voltage of a PN junction diode. Can u please tell us the solution

@strangeperson700 4 жыл бұрын

Why didn't you use the 100 ohm from R1 when calculating Req, so that R1 @ 100 ohm will be in series with R2 + R Device to give 190.9 ohms? Was it Req of the entire circuit or just the part around R2 + R Device?

@mike_kachow7449 4 жыл бұрын

Cant explain how helpful this channel is

@EggPuffsEdge 5 жыл бұрын

God of mathematics and science

@crispychickenwing 4 жыл бұрын

can you make a video explaining about delta wye conversion...ur explanation helps alot.No other channel can make me understand something as fast as yours

@kumarsujal4969 Жыл бұрын

Are voltage divisor and current divisor concepts used in capacitors, batteries etc ? Just like in resistors

@SaleemUllah-FETBSEEF 3 жыл бұрын

We really love you sir

@kataraarts3027 Жыл бұрын

Your a real one for this

@anselmtuachi3298 4 жыл бұрын

Please what app did u use in writing and drawing the circuits......it made explanations easier....let me know the name of the app please

@haroldsajeev4156 2 жыл бұрын

In question 5....how did you get R2 as 50 ohms

@shitheadjohnson2797 2 жыл бұрын

thanks for including CURRENT!!! i blew my fuse on my multimetre so i couldnt find out what it was...

@maxsiat4541 4 жыл бұрын

I have a transformerless LED driver from a China LED Bulb but it's voltage output is more than 300V DC. Can I reduce the V-out to 45V DC using this Voltage Divider Method? Will it be safe to used to turn on several SMD LED in series??

@dogscattrainingandfeeding4229 3 жыл бұрын

hi thank you for the information you din't show us how you calculated Resistor equivalent on qsn 4

@Coolarj10 3 ай бұрын

Amazing!! Thank you!

@TheAhmedkader 3 жыл бұрын

found kind of a hacky way to find the resistances. If you divide 12v/20v you get 0.6 and 0.6x400Ω is 240Ω, so you get r2 from that equation. no clue how that worked out but somehow it did.

@dahlia2631 3 жыл бұрын

If multimeter shows Vin with respect to Vout to be a lesser value than expected what could be the reason?

@abdulsaboor8647 5 жыл бұрын

wow sir you are everywhere..

@VK-il9kv 3 жыл бұрын

4:10 if u want to decrease the voltage why do the resistors have to be the same? thank you so much xx

@hapsti 2 жыл бұрын

thats to divide in half, they have to be the same to divide in half

@jamiuomowasanjo6182 Жыл бұрын

I don't know if I can get clarification on how the external resistance across R2 is 50 ohms while the internal resistance across it is 5000 ohms.

@anton-3359 9 ай бұрын

shouldnt number 4 be R2/90.9+R2? if we want to solve the voltage across R2 specifically?

@dxlf2346 5 жыл бұрын

Thank u for the vedio, but i can't understand how we decide resistors for circuit with knowing Am .

@liviuconstantin9960 4 жыл бұрын

You need to know more. For example: I build a circuit to turn on an appliance using an LDR (light dependent resistor). The specs said that it has a resistance between 5k and 500K (depending on amount of light). So I choose the minimum to work which is 5k. Next I looked at my relay. It said that it needs minimum 2V to turn on. So no I know that my Vout is 2V. I also know that my R1 the (LDR) is 5k. I also know my Vin because I used a 5V supply. With all this info I was able to build the circuit using this voltage divider here and I turned on the appliance with a flashlight over my LDR resistor. All I had to do was to find R2 to give me the 2V at Vout (which was the relay).

@daultonmcintee7367 Жыл бұрын

im on reading week and totally forgot i had an assignment and had a massive brain fart, i could kiss you! thanks bro!

@AnanomousRex 6 ай бұрын

Another easier way is that the voltage in series adds up so you can subract the given voltage against the total voltage to find the missing voltage across 1 resistor

@giannislarisagate1221 4 жыл бұрын

Yes nice video but how can i make the transfer function of this ?

@jeshnu5922 Жыл бұрын

how should calculate input voltage

@UndyingEDM 3 жыл бұрын

Is Vin referring to the total Voltage? I'm not entirely sure about this but otherwise it wouldn't make sense. Assuming that Vin doesn't refer to Vtotal, then I assume its the voltage "coming in" from the first point we measure it, right before Req. But after assuming this, Vin shouldnt be equal to 20V which is Vtotal since R1 should cause a voltage drop before the starting point that we're measuring. Can someone explain? I feel like I understood part of it but didn't get the main point. **If** my assumption is right, then shouldnt we say Vtotal instead of Vin?

@rodneycrentsil4661 3 жыл бұрын

Please how do you calculate for the input and outputt

@abdelazizsamy8068 Ай бұрын

Does that mean that if I want to limit the current I should add R2 again?

@serignembackeka8751 3 жыл бұрын

For #5, I think the current that being delivered from the battery is not 60.2mA because in his calculation, he did not allow for the the current that being consumed by R1 = 150 ohm.

@tristanhamilton5590 10 ай бұрын

I know it’s been two years, but for anyone else wondering the same thing. No, he is correct. Current does not drop in a series circuit. So the current before resistor 1 is the same as current after resistor 1

@techNK12 8 ай бұрын

Thank u I can u dis in my modification circuit

@andyquach8437 4 жыл бұрын

#5 is not clear

@fnm1900 Жыл бұрын

Thank you so much.

@rydjaradat 2 жыл бұрын

Just a Word of thank you for your efforts to make this simple, I came across a voltage divider problem in lab and saw the efficiency was terrible with parallel device to R2 , this video made my day thank you from all my heart.

@edward3105 2 жыл бұрын

On the 5th problem how did you know that R2 should be 100x less than the device resistor?

@anonymousgaslighter345 Жыл бұрын

did you ever get an answer?

@MEan0207 5 жыл бұрын

Thanks

@superspike769 2 ай бұрын

7:40 for this question i solved it slightly different but got the same answer. i did 12/20 times 100 which equals 3/5. i know that R2 must be 3/5 of 400 and that leaves R1 to be 2/5.

@Inamatsuri Жыл бұрын

Thanks tomorrow is my exam😎

@pravalikachigurla3282 Жыл бұрын

how can we maintain that voltage without changing the resistor value

@dhruvsharma3174 6 жыл бұрын

Nice one

@Sniffles669 3 жыл бұрын

why is the current in milliamps instead of just amps at 21:30

@bones1225 3 жыл бұрын

3 beers and a shot of whiskey, watching tube. You make more sense. Definitely better understanding for me , rather than by my highly qualified engineering mates in the pub. Ta.

@elahafaizi6289 4 жыл бұрын

How is Rout related to R when voltage output is zero

@balajuniper 4 жыл бұрын

Usefull tips

@kevinsanvictores2618 2 жыл бұрын

Why did you divide r2 by a hundred in 18:02 ?

@suffiessrb2584 3 жыл бұрын

Wait hold up, what I learn for, it just do it with series circuit would be more efficiency? Why don't they just put it as series circuit?

@14CoreyD Жыл бұрын

Why was question four raised to the -1 power?

@otsilediale5399 Жыл бұрын

😂this guy is literally saving my electrical engineering degree

@abdulsaboor8647 5 жыл бұрын

love you sir...

@saminjahan4037 3 жыл бұрын

no derivation of the voltage divider formula?

@nickpierpoint4116 6 жыл бұрын

So where is the required voltage taken from? Across r2? Would you connect a component across it?

@faridi-bin-Zouq 6 жыл бұрын

yes + across and - to negative

@johnwriterpoet1783 5 жыл бұрын

I hope I understand you correctly the voltage is what you select you choose a voltage and you choose the current then you figure out the resistor size

@SaleemUllah-FETBSEEF 3 жыл бұрын

Hello sir . Sir i cant beleive this because you can solve or know about every topic .from every subjects how you can do this

@umar8673 3 жыл бұрын

bhai he is an all rounder

@PepeTostado Жыл бұрын

What if we had more resistances could we still do (r1/(r1+r2+r3)) or we’d need to do it two at a time

@sambalgoreng Жыл бұрын

can just add more

@Martinko_Pcik 11 ай бұрын

4:33 but the output to the load on the divider is 50mA and not from the battery. I think that is the real practical problem

@danielteyehuago1633 Жыл бұрын

I'm here again. Thanks for sharing it with us daddy

@anijher1 3 жыл бұрын

why did you place the internal resistor in parallel and not series @8:39? I mean what's the thought process behind it?

@stabilo8588 2 жыл бұрын

i think bcz it said across it

@gold6836 3 жыл бұрын

thanks you legend

@abdulrahmanmohamed2470 2 жыл бұрын

Is this For IGCSE or A-levels?

@insaneeeeeeeeeeeeeeeee 5 жыл бұрын

At 06:00 Why u considered only 2 resistors to design vdr circuit..why not 3or4? and at 09:04 current must enter in to 100ohm coz..current always chooses low resistance path? If reply..very thankful...

@samsungnote2683 5 жыл бұрын

1) VDR circuit only has 2 resistors. It is used to divide the output voltage in any desired ratio from the input voltage . 2) Higher resistance means lower current flow. Lower resistance means higher current flow. Current would still flow through both resistors. Just that there would be a high current flow through the 100ohm resistor.

@insaneeeeeeeeeeeeeeeee 5 жыл бұрын

@@samsungnote2683 thankyou

@sabhashahid Жыл бұрын

Thank you so much! Sir your lectures help me alot

@dickbrock 2 жыл бұрын

Thanks!

@aarronkoshy9343 2 жыл бұрын

2:11 BREAKING NEWS: THE LEGENDARY ORGANIC CHEMISTRY TUTOR HAS USED A CALCULATOR

@ayubmakawa7291 2 жыл бұрын

good video

@bigsasquatch7099 3 жыл бұрын

Thankyou bro

@jeffreynelson9917 Жыл бұрын

you lost me @ 17:40 ... Does anyone know the logic behind this other than looking at other examples?

@johnwriterpoet1783 5 жыл бұрын

The only accurate way to determine R2 is to use a load and adjust R2's voltage with a potentiometer to arrive at the correct voltage. The resistance on the other side of the potentiometer is R1. I have done this so I know.