What type of electric charge does an electron possess?

What will happen to the current flowing through a conductor,if the potential difference is doubled?

Give two practical applications of the heating effect of current.

How much work is done in moving a charge of $2 \, C$ across two points having a potential difference of $12 \, V$ (in $, J$)?

In an electric circuit,state the relationship between the direction of conventional current and the direction of flow of electrons.

In the figure given below,$A, B$,and $C$ are three ammeters. The ammeter $B$ reads $0.5\, A$. (All the ammeters have negligible resistance.) Calculate:
$(i)$ the readings in the ammeters $A$ and $C$.
$(ii)$ the total resistance of the circuit.