Question

Across a metallic conductor of non-uniform cross section
a constant potential difference is applied. The quantity
which remains constant along the conductor is : [2015]
(a) current (b) drift velocity
(c) electric field (d) current density

Answer 1

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current is defined as charge flown per unit time, it should be remain same along any cross section as there is no accumulation of charge in conductor. hence current will remain constant. ... when the area of cross section of resistor varies it,s resistance will also vary.

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Answer 2

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1) Current.

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electric current which is basically the rate of flow of charge remains constant over the wire though out each and every cross section.

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