The area of cross-section of cylindrical wire increases uniformly from left to right as shown in figure. When steady current flows in the wire, then in the direction of current

Question

The area of cross-section of cylindrical wire increases uniformly from left to right as shown in figure. When steady current flows in the wire, then in the direction of current (A) Drift speed increases (B) Drift speed decreases (C) Electric field intensity increases (D) Current density increases

Tardigrade Admin · Accepted Answer

i=n e A V d ⇒ Vd propto (1/A)

Q. The area of cross-section of cylindrical wire increases uniformly from left to right as shown in figure. When steady current flows in the wire, then in the direction of current

Drift speed increases

Drift speed decreases

Electric field intensity increases

Current density increases

$i = n e A V_{d}$
$\Rightarrow V_{d} \propto \frac{1}{A}$

Q. The area of cross-section of cylindrical wire increases uniformly from left to right as shown in figure. When steady current flows in the wire, then in the direction of current

Drift speed increases

Drift speed decreases

Electric field intensity increases

Current density increases

i=neAVd​ ⇒Vd​∝A1​

$i = n e A V_{d}$
$\Rightarrow V_{d} \propto \frac{1}{A}$