I'm an as student being benefitted from these amazing videos but I feel kind of sad seeing the teacher doesn't update his channel anymore yet he has over 100k subs
Thank you! This is just so darn good. If you came looking how to understand a potentiometer, watch the whole thing. The beginning examples are ideas necessary to understand the potentiometer concept.
yes this is since Resistance is directly proportional to Length and inversely proportional to cross sectional area( this is only where there is a wire across a circuit). But if this resistor was a thermistor since the resistance of a thermistor is also now dependent on the temperature of the thermistor , actually now it is an inverse proportionality meaning as the temperature of the thermistor is increasing , the resistance will decrease
These longer videos are useful, it's so much easier to understand more when you lead from one thing to another, and always thinking back to one particular example. Also nice to have examples to real life as sometimes electricity just seems to me too random to be part of everyday life. Thanks for the videos.
Expertly presented! Was having a bit of trouble understanding the difference between rheostats and potentiometers, and you outlined it all in a way that was extremely easy to grasp. Thank you!
i have already written my A level physics(100 percent for theory). but i still love coming to watch these videos. they are amazing and remarkably entertaining.
Great video! At the very end when you solve x = 4.4cm ....you were actually solving x for the value of R1, so it should be x = 4.4 Ohms. Or, Vo = 4v when the position of the potentiometer is such that R1 = 4.4 Ohms. Thanks!
They pretty much do the same thing. But one has three terminals and the other only two. in essence, in the former, you apply the full voltages across the device and tap off a particular value. In the second case you are simply using a variable resistance.
As soon as you hook something up across Vo it is going to draw some current. So the current passing through R1 is no longer the original I value, and so how can Vo still be 5V?
whenever you hook up a resistive load across one of the two resistors in the voltage divider... i did some googling to learn more and apparently they call it loading effect..
Thank you for the explanation.I realize that this is a long question but I would appreciate help!!I have a question regarding the last minute of the video. If we connect a bulb to the potentiometer, such that the output voltage reaches the bulb, what would happen if we move the slider to the part where it gives 0 output voltage? Will the bulb light up? Because essentially the bulb is connected in parallel to the battery so shouldn't it receive voltage from it directly and light up regardless of the output voltage? Thanking you in advance..
In potentiometer circuit ,when electrons are travelling from the negative terminal of the battery to positive ,why is the resistance at the tail of the resister considered zero?shouldn't it be considered 10?as now electrons has to travel the longer paath?
In real world, if I want to control the brightness of light bulb, I should design this circuit in potentiometer method or in rheostats method? Which one is most appropriate and high efficiency?
Sir, when you talk about the output voltage in a potential devider, if we decide to connect anything in parrallel with that resistor, such as a light bulb, wouldn't that just change the resistance because we now have a series-parrallel combination? Also, when we talk about practical uses, those 6V that you wanted across one of the resistors, would we imagine our selves placing a bulb instead of the resistor, or connecting a bulb in parrallel with the resistor?
so if you have one power source of 10 V and drop five 2 ohm resistors into it , then you could run five 2 volt lines to power 5 other separate things. well actually no, because those lines would draw from the source. so you would divide and use?? once or twice?
Just like any resistor the by product is heat. So how do you size the potentiometer. If the potentiometer (Pot) is too small you will burn a spot in the middle of the pot variable
just curious if you had a 10,000 ohm varible resistor what is the minimum resistance? is it 0ohm? or do they still restist when turned down? or should i say what is the minimum resistance of a 10k variable restor? is it 0ohms?, i think there's still resistance, i got a 470ohm variable resistor on a fan and it's spinnering slower then it should, i only need 70 ohms for the fan but it seems the resistor is resisting more then just 70 ohms when dialed right down?
Kiran Gudigar A rheostat is a variable resistance. Only the slider and one other terminal are used. A potentiometer uses all three terminals, enabling a variable voltage or signal to be tapped off from the slider.
I'm an as student being benefitted from these amazing videos but I feel kind of sad seeing the teacher doesn't update his channel anymore yet he has over 100k subs
maybe he will once the curriculum changes
Thank you! This is just so darn good.
If you came looking how to understand a potentiometer, watch the whole thing. The beginning examples are ideas necessary to understand the potentiometer concept.
The resistance varies with the length of the active part of the potentiometer. So as length decreases so does resistance.
Sir, why did you stop uploading videos since 6 years :/
yes this is since Resistance is directly proportional to Length and inversely proportional to cross sectional area( this is only where there is a wire across a circuit). But if this resistor was a thermistor since the resistance of a thermistor is also now dependent on the temperature of the thermistor , actually now it is an inverse proportionality meaning as the temperature of the thermistor is increasing , the resistance will decrease
These longer videos are useful, it's so much easier to understand more when you lead from one thing to another, and always thinking back to one particular example. Also nice to have examples to real life as sometimes electricity just seems to me too random to be part of everyday life. Thanks for the videos.
Expertly presented! Was having a bit of trouble understanding the difference between rheostats and potentiometers, and you outlined it all in a way that was extremely easy to grasp. Thank you!
Potentiometers - 10:03
Lmfao tysm
Brilliant. I've had this explained to me before but no so simply and eloquently that I understood. Thanks.
14:17 Vsauce xD
HAHAH this is gold
Good luck. I hope they go well.
Lovely! You are a teacher, I enjoyed d video so much I had to see out the entire minutes without skipping a second. Salute ⭐⭐⭐⭐⭐
He loves green marker, but the best Physics teacher in UA-cam
Just wish he continued to make videos
Thanks Sir You are really explaining by excellent stepwise simple way
i swear you are the best teacher
i have already written my A level physics(100 percent for theory). but i still love coming to watch these videos. they are amazing and remarkably entertaining.
This was the best version I've seen.
Thank you very much sir. You saved me from lots of confusions.
Such a beautiful explaination. Period.
THANKYOU this helped me so much!
Great video! At the very end when you solve x = 4.4cm ....you were actually solving x for the value of R1, so it should be x = 4.4 Ohms. Or, Vo = 4v when the position of the potentiometer is such that R1 = 4.4 Ohms. Thanks!
incorrect! he was solving for the length of the potentiometer that gives the required voltage and resistance
Excellent, subscribed.
They pretty much do the same thing. But one has three terminals and the other only two. in essence, in the former, you apply the full voltages across the device and tap off a particular value. In the second case you are simply using a variable resistance.
As soon as you hook something up across Vo it is going to draw some current. So the current passing through R1 is no longer the original I value, and so how can Vo still be 5V?
Can you tell me the time at which this happens please?
whenever you hook up a resistive load across one of the two resistors in the voltage divider... i did some googling to learn more and apparently they call it loading effect..
If you could use the original symbol for the resistor, It'd be more helpful.
Thank you so much!! This was very helpful :)
Thank you sooooo Much for this Video I really appreciate
Great 👍 sir
Mi just love these lectures
very wonderful
Thank you so much. That was so helpful!
Thank you for the explanation.I realize that this is a long question but I would appreciate help!!I have a question regarding the last minute of the video. If we connect a bulb to the potentiometer, such that the output voltage reaches the bulb, what would happen if we move the slider to the part where it gives 0 output voltage? Will the bulb light up? Because essentially the bulb is connected in parallel to the battery so shouldn't it receive voltage from it directly and light up regardless of the output voltage? Thanking you in advance..
Wow! Can't believe we are doing A Level Physics in Grade 9
wow! when i was in grade 9 i didnt have any of these, im in my first year of A levels and im learning this now
Where are you from lmao
me too??????
In potentiometer circuit ,when electrons are travelling from the negative terminal of the battery to positive ,why is the resistance at the tail of the resister considered zero?shouldn't it be considered 10?as now electrons has to travel the longer paath?
In real world, if I want to control the brightness of light bulb, I should design this circuit in potentiometer method or in rheostats method? Which one is most appropriate and high efficiency?
Something that teachers in school generally dont teach us :p
Thank you like hell :)
Thank you so much
Do we make the assumption that the resistance would be equal to the length in 14:37 at all times?
Yes as long as the resistance is uniform.
Thank you
Thank you kindly
Sir, when you talk about the output voltage in a potential devider, if we decide to connect anything in parrallel with that resistor, such as a light bulb, wouldn't that just change the resistance because we now have a series-parrallel combination?
Also, when we talk about practical uses, those 6V that you wanted across one of the resistors, would we imagine our selves placing a bulb instead of the resistor, or connecting a bulb in parrallel with the resistor?
Wonderful explanation
Thanku soo much sir
Pronounce current as a maximum current... Which is perfect
so if you have one power source of 10 V and drop five 2 ohm resistors into it , then you could run five 2 volt lines to power 5 other separate things. well actually no, because those lines would draw from the source. so you would divide and use?? once or twice?
why would the voltage not change in the potentiometer
Just like any resistor the by product is heat. So how do you size the potentiometer. If the potentiometer (Pot) is too small you will burn a spot in the middle of the pot variable
just curious if you had a 10,000 ohm varible resistor what is the minimum resistance? is it 0ohm? or do they still restist when turned down? or should i say what is the minimum resistance of a 10k variable restor? is it 0ohms?, i think there's still resistance, i got a 470ohm variable resistor on a fan and it's spinnering slower then it should, i only need 70 ohms for the fan but it seems the resistor is resisting more then just 70 ohms when dialed right down?
Thanks sir!
What is the difference between a potentiometer and a rheostat?
THANKS SIR
please make one more video about wheatstone bridge
in potentiometer if upper wire is removed and attached to the lower part of wire?
So it means R1 + R2 = 10ohm? in every condtion or in saturn condition?
Thanks
The best
careful DrPhysicsA, are these batteries or are these cells??
At time in the video 11:58, how does one get R1 + R2 = 10?
Does the potentiometer and the rheostat holds the same definition?
9:50 How does 3R1=2R1+2R2 simplify to R1=2R2? Shouldn't it be R1=(2R1+2R2)/3?
You just plop the 2R1 on the left side. I mean your question is probably not relevant anymore after a month but whatever :D :D
please do clear ma dobt anyone :
is it right to draw the effective " divided potenial " in the circuit with a celland an internal resistance symbol ?
No
what is difference between rheostat and potentiometer
Kiran Gudigar A rheostat is a variable resistance. Only the slider and one other terminal are used. A potentiometer uses all three terminals, enabling a variable voltage or signal to be tapped off from the slider.
Live saver XXXXXXXX
shehzada
i love you
So reostat is dc
i learn this for o level
Ahaha Vsauce! 9:01
Sir, why don't u reply my Answers ?
I dont believe he has the time for all of us, so I suggest you to just be patient :)
Hindi me potentiometer he to upload ki jiye
ur a don
vg
As-level unit 2 tomorrow ._.
Not you again xD
ahaha hello xD
lol.. you doing ocr?
Nope Edexcel
ahh ok.. similar things on both though