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

Question

Current flows through a metallic conductor whose area of cross-section increases in the direction of the current. If we move in this direction. (A) the current will change (B) the carrier density will change (C) the drift velocity will increase (D) the drift velocity will decrease

Tardigrade Admin · Accepted Answer

I=n e A vd ⇒ vd=(I/n e A) vd propto (I/A) ; so as A increases vd decreases

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.

the current will change

the carrier density will change

the drift velocity will increase

the drift velocity will decrease

$I = n e A v_{d} \Rightarrow v_{d} = \frac{I}{n e A}$
$v_{d} \propto \frac{I}{A};$ so as $A$ increases $v_{d}$ decreases

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.

the current will change

the carrier density will change

the drift velocity will increase

the drift velocity will decrease

I=neAvd​⇒vd​=neAI​ vd​∝AI​; so as A increases vd​ decreases

$I = n e A v_{d} \Rightarrow v_{d} = \frac{I}{n e A}$
$v_{d} \propto \frac{I}{A};$ so as $A$ increases $v_{d}$ decreases