Drude Model: Electrical Conductivity

[@shivamrathod9030]

one of the most useful things i have ever learned in my life from yr lectures ,thanks you sir its our pleasure to have teachers like you....

[@tejaskalluraya7788]

Today Prathap Sir Heads one of the biggest Online Data Science degree programs in IIT-M. Thank you sir!

[@hirakjyotibaishya1866]

Very useful video...i have seen lots of video regarding this topic and this is best

[@dipsiitg]

Thank you Dr. Prathap for the lectures :) it's really useful

[@meonyoutube2977]

I don't understand the connection between vf and tau. As I understand, vf is sort of terminal velocity that electron acquires as electric force and damping force balance each other. But there should be no reason that electron acquires vf speed in time tau. Even if it acquires, after time tau, on average since there is a collision, electron has this vf for zero duration?

[@harsaann1923]

Feynman lecture 43 has the answer.

[@saikumarkrithivasan136]

The dragging force exist at all time, even without collision. I guess, the assumption should be, the electron reaches terminal velocity so fast, that it looks as if it moves with velocity vf for most of time

[@saikumarkrithivasan136]

@@harsaann1923thanks…will refer

[@charulakshmi1902]

Thanks for a gud lecture sir but i have a doubt near 30:35 we know Vf=a tau, so wont V/Vf at tau be one in the graph

[@dipeshtrivedi464]

at the same place, shouldn't it be (V/Vf) v/s t. instead of "tau"...as we know that tau is just a constant in that eqn ? ..pls suggest! and also the scattering time should be decreasing with time, right?

[@sg40083]

At time taw the velocity is vf. In graph how Can we have taw, 2 taw, 3 taw at some taw the value goes to vf

[@aryensujjan]

i just fall love this lecture

[@elayakumark5336]

Dear sir, Kindly mention the reference book for this topic...😊

[@meonyoutube2977]

at 23:00, v=vf at t=tau. but at 29:00 v = vf at t = infinity. please somebody explain the discrepancy...

[@blzKrg]

Did you understand it yet? I don't.

[@arjunag7553]

@@blzKrg My understanding is that its not at t=tau, but as t tends toward infinity v gets closer to final velocity..

[@AbdolazimHasseli]

Thanks. I learned something!

[@aarya8247]

sir,how can we compare optical transparency of metals using drude model??

[@senburt]

My head hurts with the amount of totological "consistency proof" it has been exposed to.

[@HudsonZanin]

that was very helpful. Cheers!

[@nivasramachandiran791]

How can we substitute (a = eE/m)? It should be a = (eE/m)*(1-v/vf). isn't?

[@faisalalqawsi8018]

Thanks for this informative lecture , but how can the velocity reaches Vf at T( tau) according to one formula or equation and not reaches Vf at T( tau) according to the last formula ?

[@saikumarkrithivasan136]

Velocity will reach v_f only when t tends to infinity I guess, he may mean when t reaches 2 tov or something velocity comes close to v_f

[@emmanuelonyekaezeoba6346]

Thank you so much sir.

[@elamvaluthis7268]

Nice.

[@DavidLeeMenefee]

is that english?