
$R _1=\frac{3 R }{2}, R _2=\frac{2 R }{3}, R _3=\frac{ R }{3}, R _4=3 R$
Since $i$ is same, hence $P \alpha R$ so options $(4)$ is correct
$B$. 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:


