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Using theory of drift velocity, express Ohm's law.

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We consider a conductor of cross section area A and length I in which drift velocity of electron is Vd Applied voltage is V and electric field E between conductor ending point.

So, electric current , l = neAVd

We thus see that a very simple picture of electrical conduction reproduces ohm's law.

We have of course, made assumption that τ and n are constants, Independent of e ∈.

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