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Q.

Current flows through a metallic conductor whose area of cross-section increases in the direction of the current. If we move in this direction.

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a

the current will change

b

the carrier density will change

c

the drift velocity will increase

d

the drift velocity will decrease

answer is D.

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Detailed Solution

I=neAvd⇒ vd=IneAvd ∝  IA ;  so  as  A increases  vd  decreases
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