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Questions  

Drift velocity vd varies with the intensity of electric field as the relation :

a
vd∝E
b
vd∝1E
c
vd= constant
d
vd∝E2

detailed solution

Correct option is A

vd=em×V1τ or vd=em⋅E11τ [∵ V=E1]∴ vd∝E

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