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

The current through a wire depends on time as $i = (2+3t)\, mA$. The charge crossing through a section of the wire in $1\, min$ is .............. $C$.

The charge on a capacitor plate in a circuit,as a function of time,is shown in the figure. What is the value of current at $t = 4 \, s$ ? ............... $\mu A$

The current in a conductor varies with time $t$ as $I = 2t + 3t^2$,where $I$ is in ampere and $t$ is in seconds. The electric charge flowing through a section of the conductor during $t = 2 \, s$ to $t = 3 \, s$ is ............. $C$.

The current flowing through a wire depends on time as $I = 3t^2 + 2t + 5$. The charge flowing through the cross-section of the wire in the time interval from $t = 0$ to $t = 2 \ s$ is: (in $C$)

In conductors,in the absence of an electric field,although electrons are in motion,why is no current formed?