In the arrangement shown, the equivalent resistance between points $A$ and $B$ is $kR$. Then, the value of $k$ is:-

In the figure, the current flowing through $2R$ is,

In the electrical circuit shown below, what is the effective resistance between points $P$ and $Q$ ?

In the circuit shown, the value of each resistance is $r$. Then equivalent resistance of circuit between points $A$ and $B$ will be

A wire has resistance of $24 \mathrm{\Omega }$ is bent in the following shape. The effective resistance between $A$ and $B$ is

The reading of voltmeter is