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Deduce Ohm's law using the concept of drift velocity. |
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Answer» SOLUTION :We know that the drift velocity is given by `v_(d)=(I)/(N eA)`. . . (i) Also `v_(d)=(eEtau)/(m)`. . (II) From eqs. (i) and (ii), `(eEtau)/(m)=(I)/(n eA)` or `(E)/(I)=(m)/(n e^(2)Atau)` or `(V)/(lI)=(m)/(n e^(2)Atau)` or `(V)/(I)=(ml)/(n e^(2)A tau)` or `(V)/(I)=(ml)/(n e^(2)A tau)=R` (constant) or `V=IR`. |
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