The magnitude of the drift velocity per unit electric field is known as . . . . . . .

Drift velocity $V_d$ varies with the intensity of electric field $E$ as per the relation:

Which of the following is a vector quantity?

$A$ cylindrical resistor is connected across a battery $\varepsilon$. The cylinder has a uniform free electron density, and the middle part of the cylinder has a larger radius as shown in the figure. Which of the following graphs represents the variation of $V_d$ (drift velocity) with respect to $x$ (distance along the length of the resistor)?

In a wire with a cross-sectional area of $1 \, cm^2$ carrying a current of $24 \, mA$,the electron number density is $3 \times 10^{23} \, m^{-3}$. What is the drift velocity?

When a potential difference is applied across a linear metallic conductor,then: