If a current of $8 \ A$ flows through a heater wire,what is the number of electrons passing through it in one minute?

The quantity $X = \frac{\varepsilon_0 LV}{t}$,where $\varepsilon_0$ is the permittivity of free space,$L$ is length,$V$ is potential difference,and $t$ is time. The dimensions of $X$ are the same as those of:

$A$ current through a wire depends on time as $i = \alpha_{0} t + \beta t^{2}$ where $\alpha_{0} = 20 \, A/s$ and $\beta = 8 \, As^{-2}$. Find the charge crossed through a section of the wire in $15 \, s$ (in $C$).

$A$ current of $1\, mA$ is flowing through a copper wire. How many electrons will pass a given point in one second?

$A$ steady current flows in a metallic conductor of non-uniform cross-section. Which of the following quantities is constant along the conductor?

In a hydrogen discharge tube,it is observed that through a given cross-section,$3.13 \times 10^{15}$ electrons are moving from right to left and $3.12 \times 10^{15}$ protons are moving from left to right per second. What is the electric current in the discharge tube and what is its direction?