A wire is connected to a battery and drift velocity of electrons in the conductor is v0 . If wire is stretched to quadruple its length and connected to same battery, the new drift velocity is

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v04

v02

2v0

4v0

answer is A.

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Detailed Solution

i=neAvd =VR=VAρl vd= Vρlne her v is constant l becomes 4l so vd becomes vd/4

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