“In lightning in the sky,there is a steady flow of charge”. -True or False?

Define electric current and explain it. Write its $SI$ unit.

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

Explain the current formed in solid conductors in the presence of an external electric field.

Define the $SI$ unit of electric charge in terms of the Ampere.

The current in a conductor is expressed as $I = 3t^2 + 4t^3$,where $I$ is in Ampere and $t$ is in second. The amount of electric charge that flows through a section of the conductor during $t = 1 \ s$ to $t = 2 \ s$ is . . . . . . $C$.