In the circuit shown in the figure,the current $I$ is (in $\,A$)

$A$ Wheatstone bridge has the resistances $10 \Omega, 10 \Omega, 10 \Omega$ and $30 \Omega$ in its four arms. What resistance joined in parallel to the $30 \Omega$ resistance will bring it to the balanced condition (in $Omega$)?

Refer to the figure given below. The values of $I_1, I_2$ and $I_3$ are . . . . . . .

In the circuit shown in the adjoining figure,the current between $B$ and $D$ is zero. The unknown resistance $X$ is ................ $\Omega$.

In a Wheatstone bridge,all the four arms have equal resistance $R$. If the resistance of the galvanometer arm is also $R$,the equivalent resistance of the combination as seen by the battery is

Consider the circuit shown in the figure where all the resistances are of magnitude $1 k \Omega$. If the current in the extreme right resistance $X$ is $1 mA$,the potential difference between $A$ and $B$ is: (in $V$)