Question

Drift velocity $\left(v_d\right)$ depends upon the electric field, in which the following dependence of drift velocity on the electric field obey the ohm's law is :

• A. $v_d\propto E^2$
• B. $v_d\propto E$
• C. $v_d\propto E^{1/2}$
• D. $v_d$ = constant

Answer 1

The correct option is B $v_d\propto E$

As we know,

$Driftvelocity,|v_d|=\frac{eE\tau }{m}$
$\therefore v_d\propto E$