Current without potential difference

We generally take potential difference across the connecting wires in a circuit as zero. Still there exists a current in these wires. How? H C Verma answers this question.

[rahulg.]

This is the first good thing which 'you tube' recommended me

[amanpratapsingh]

Great to see a veteran in field clearing fundamental doubts of students thereby encouraging us to invest out time in this beautiful subject.

[harmeetsingh-sxqu]

I had book of HC Verma in year 2001, that time I was in 11th class. My teacher, VK Handoo told to go through HC Verma... Though I managed to buy but never managed to get that level of potential in myself to read and understand it.... It was very very good book that time. One of the finest book that time. I never imagined that I will see its author one day.... Especially in you tube.... I'm surprised that after around two decades after I purchased I will be able to see HC verma sir, giving lectures on his books.... Glad to see this... Our generation is very unlucky that we don't had YouTube in those days....

[Goatshorts]

90%of people just came
to watch his teaching style😉

[subhajitghosh]

This is one of most haunted questions in Physics. Verma Sir is a legend of our country.

[kashifsyed]

The students who studied in his class are sooo lucky

[deepjyotideka]

His simplicity in delivering lectures in an example which we young generation should look upto....man with knowledge + man with value = a real man..thank you sir.

[ranchhordaschaanchad]

This genius made Physics understandable to the human being!

[rubipreethi]

My god!!never thought verma sir would have YouTube channel why is YouTube recommending me this channel after 4 years

[christophersterman]

I think this question is the same as asking how an object in frictionless space can travel with a constant velocity despite not changing its potential energy. It does so, because objects in motion must remain in motion until acted upon by an outside force.

In this case the electrons in the wire experience a change in potential energy across the resistor that provides them with the kinetic energy to complete the circuit. The motion of the electron through the "frictionless" wire is not due to a potential difference in the wire, but to conserving kinetic energy in the absence of an outside force.

[vijuvlogs]

If I remember correctly, the Ohm's law states that current (I) is proportional to the potential/voltage and not the other way around. So I °< V.
°< is used by me for proportionality symbol.
And R is an entity independent of these two (current and potential) and is a proportionality constant and this will not vary. When I say it will not vary, I am talking about static resistor used. We can definitely use variable resistor but at a given point of time, it will be constant. Plus the negligible resistance from the conductor material which again should be constant and depends on the material/metal used.

And when it comes to potential being zero, it will never be zero. There will be some negligible amount of potential difference which is very very close to zero. And hence, there will be current. 2 A is very huge but it was just an example used for mathematical validation of V=IR. In reality, that zero is indeterminate as you guys rightly said because that value is very close to zero. Let's say 1 mV or even less and a negligible resistance of < 1 ohm from conductor assuming 0 for resistance like sir said. The value will have more zeros after the decimal point and in reality something dividing by something will give a value no matter how small both values are and hence that value is current which is not zero.

Hope this is useful 🙏

[seeutube]

Good observation Subhankar. In job (10years after I completed 8th std) while designing a circuit, I realised that my teacher forgot the assumptions and it never stuck me. For every concept, all assumptions must be included so that students understand concepts perfectly.

[aadityaacharya]

For people who didnt understand, heres the logic, you have 2 tanks at the same level connected with a pipe so no water flows because they have the same level of water, as soon as you connect a 3 rd tank to the 1 st 2 tanks with less water, the rate of flow of water from the 2 tanks which have 0 difference in water height start flowing and their heights decrease at the same rate filling the third tank . So verma sir s logic holds good

[neetugair]

BIG FAN SIR AWESOME METHOD OF TEACHING, BOOKS THAT YOU'VE WRITTEN HAS HELPED A WHOLE GENERATION OF STUDENTS. MAY GOD BLESS YOU SIR, STAY HEALTHY, SAFE. SALUTE TO THIS GENIUS

[vivekanandapattnayak]

Actually the current drawn from a voltage source depends on the external resistance ( here) or overall resistances present in a ckt. Current - effect, overall voltage diffence - cause...and it's value depends on resistance...so it never see the potential difference somewhere locally zero or not....this is the concept he is trying to convey us. Ohm's also satisfied in the region where potential difference is zero..


Thanks sir...great explanation...

[eswariselvam]

Physics:I'm inevitable
Hc Verma:I'm HC VERMA

[ganapatibrahma]

You are the my inspiring Sir.
You are the gem of India.
One of the greatest teachers of Physics of the century.
Very kind hearted.
Yes,
MIT has Walter Lewin sir.
IIT has H C Verma sir.
May God bless you all the time and be happy sir.
Lots of love from Assam, India
Thanks a lot for the video

[stupidtalks]

2 minutes of silence for those who are relatives of him and are in their board year

[sunnypandey]

Really he is " HC VERMA " ??. I never imagined he has a YOUTUBE channel .... but why subscription is very less ???

[mayanksahu]

12 years after studying his book. This is the first time I am seeing "The HC Verma"