The unit of measurement of charge is coulomb.

What is the direction of conventional current?

Which of the following combinations of cells in series (as shown in the figure) correctly represents the arrangement to obtain maximum potential?

$(a)$ How is the direction of electric current related to the direction of flow of electrons in a wire?
$(b)$ Calculate the current in a circuit,if $500 \, C$ of charge passes through it in $10$ minutes.

An electric iron draws a current of $0.5\, A$ when the voltage is $200\, V$. Calculate the amount of electric charge flowing through it in one hour. (in $C$)

Which law is used to calculate the magnitude of the electric force between two electric charges?