The value of $I$ in the figure shown below is: (in $\text{ A}$)

The equivalent resistance of the following circuit when no current flows in the resistance of $5 \Omega$ is nearly (in $\Omega$)

In the network shown in the figure,each of the resistance is equal to $2\,\Omega$. The resistance between the points $A$ and $B$ is .............. $\Omega$.

When the value of $R$ in the balanced Wheatstone bridge, shown in the figure, is increased from $5 \Omega$ to $7 \Omega$, the value of $S$ has to be increased by $3 \Omega$ in order to maintain the balance. What is the initial value of $S$ (in $\Omega$)?

In the given circuit,if no current flows through the ammeter,what is the value of $X$ in $\Omega$?

What is the value of the current flowing through the galvanometer in the balanced condition of a Wheatstone bridge?