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A steady current is passing through a linear conductor of nonuniform cross-section. The drift velocity of electrons

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a
same at any cross-section
b
variations are unpredictable
c
more at higher area of cross-section
d
more at smaller area of cross-section

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detailed solution

Correct option is D

The quantity of charge passing through any cross-section per second is nothing but the current flowing in the conductor.

As given, the current is a steady current, which means the current is uniform throughout the cross-section. 

i=neAvd

As i is constant n and e are also constant 

vd1A

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