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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a
v04
b
v02
c
2v0
d
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