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If potential difference V applied caross...

If potential difference V applied caross a condutor is increased by 2 V, how will the drift velocity of the electrons change ?

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Let R be the resistance of conductor. In first case, In second case current in conductor,
`I'= (2V +V)/(R) = (3V)/(R)= 3I`
As `I = n A e v_(d)` or `v_(d) prop I` (`:'` n, A, e are constant)
`:. (V'_(d))/(V_(d)) = (I')/(I)= (3I)/(I)=3` or `v'_(d)= 3 v_(d)`
It means drift velocity become tripled.
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