The value of the resistance $R$ in the figure is .......... $\Omega$.

The current through the $1 \Omega$ resistance in the following circuit is (in $A$)

The current $I$ in the given circuit will be $......A$.

Find the value of the current through the $2\,\Omega$ resistance for the given circuit. (in $,A$)

Four ammeters with identical internal resistances $r$ and a resistor of resistance $R$ are connected to a current source as shown in the figure. It is known that the reading of the ammeter $A_1$ is $I_1 = 3\ A$ and the reading of the ammeter $A_2$ is $I_2 = 5\ A$. Determine the ratio of the resistances $R/r$.

In the following electrical network,the value of $I$ is (in $A$)