Hence $H = \frac{{{q^2}R}}{t}$ ;
$\therefore \,\,H \propto \,{q^2}$
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$B$. The drift velocity is inversely proportional to the area of cross-section of given conductor.
$C$. The drift velocity does not depend on the applied potential difference to the conductor.
$D$. The drift velocity of electron is inversely proportional to the length of the conductor.
$E$. The drift velocity increases with the increase in the temperature of conductor.
Choose the correct answer from the options given below:
$(A)$ $R \propto n ^{1 / 3}$ and $v \propto n ^{2 / 3}$
$(B)$ $R \propto n ^{2 / 3}$ and $v \propto n ^{1 / 3}$
$(C)$ $E=\frac{3}{2}\left(\frac{n^2 h^2 F^2}{4 \pi^2 m}\right)^{1 / 3}$
$(D)$ $E=2\left(\frac{n^2 h^2 F^2}{4 \pi^2 m}\right)^{1 / 3}$
