HC Verma is wrong🙄🤔| @lecturesbywalterlewin.they9259 | @hcverma2928

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[multilogic]

The amount of respect all the Physicists and Physics Teachers have for HC Verma worldwide is mind boggling.

[prasoonjha]

It is a quantum phenomenon so order matters not the magnitude
Both r correct at their place only there is variation in kinematic equation

[Mathematicalgene]

Huge respect for rajwant sir his gratitude is ❤❤❤

[exit_again]

There may be some mistake in HC Verma but HC Verma is one of the most errorless book I have ever read and solve.
After ao many sleepless night I have completed solving HC Verma.

[monunamdeveducation]

Always respect teacher teacher never wrong frame of thinking may be different

[darkmysteryoftheworld]

Ab aya na line pe .
In fact Verma Sir also clear the confusion through his YouTube channel regarding the topic.

[sunitanirbhay]

HC Verma is correct NCERT and every information on Google is wrong. Read David J Griffith classic textbook on electrodynamics Pg 289. In fact ranjwant sir don't know correct formula.

[focusmode]

Abb jinko bhi lag rha ki sir galat bol rhe hai wo jaake Sir Richard Feyman k lectures note dekh le usmei bhi hcv ka vd ka formula wrong bataya h

[hanshnarayan]

You are just a teacher but he is a writer. So, try to understand the concept of physics by Honourable HC verma sir

[-bharatdarshan]

when we discuss the motion of subatomic particles like electron we not rely on newtonian mechanics.quantum mechanics is needed.so we take a average value so we cant say hc verma sir is wrong or other books is wrong.

[kowsalyakowsalya]

The eqn in hc verma is actually a approximation mistake...thts why he got /2 in the ans...he had taken the average time for each collision as the total time and calculated..whereas in reality its twice of the average per collision

[animaniac]

Yeah it's wrong and in Feynman lectures you can even read he specifically mentions "there is a wrong way of solving for drift velocity which will give you a 2 in the answer"
So yeah, maybe HC verma did the same mistake Feynman mentioned in his lectures

[omeshkpalawat]

Even our coaching teacher included the half factor lmao

[LMAO-fsbt]

Galat nahi hain, different modelling se nikala gaya hain

[prakashvt]

it is not a mistake but the perspective of solving that is different
In HC verma the time between the collision is average while in other it is integrated to get it😊

[scissorinfo]

Richard Feynman's explanation
"At the beginning of the collision it had zero velocity. So between the two collisions it has, on the average, a velocity one-half of the final velocity, so the mean drift velocity is 12Fτ/m
. (Wrong!) This result is wrong and the result in Eq. (43.13) is right, although the arguments may sound equally satisfactory. The reason the second result is wrong is somewhat subtle, and has to do with the following: The argument is made as though all collisions were separated by the mean time τ
. The fact is that some times are shorter and others are longer than the mean. Short times occur more often but make less contribution to the drift velocity because they have less chance “to really get going.” If one takes proper account of the distribution of free times between collisions, one can show that there should not be the factor 12
that was obtained from the second argument. The error was made in trying to relate by a simple argument the average final velocity to the average velocity itself. This relationship is not simple, so it is best to concentrate on what is wanted: the average velocity itself. The first argument we gave determines the average velocity directly—and correctly! But we can perhaps see now why we shall not in general try to get all of the correct numerical coefficients in our elementary derivations!"

[vittalr]

Both the NCERT and HC Verma sir formulae are correct. Conditions are there for each formula.

[gabbar.....]

Yes HCV is Because in his derivation he considered that time interval between all the collisions are same but that is a Big

And No-one can Complete with Socrates and Feynman they were at Next level of

[krms-blr]

मास्टर साब सविनय निवेदन की मुद्रा मे आ गए।😅😅

[aryantiwari]

Dear Sir, Rakshak Sir Ne Human Eye Chapter Ka Presbyopia & Star Ki Apparent & Actual Position Ko Galat Explain Kiya h. Vo Bhi One of the Best Teachers H.