If the power dissipated in the circuit is $150\,W,$ then the value of $R$ is ............... $\Omega$.

The equivalent resistance between $A$ and $B$ is: (in $\Omega$)

$A$ metal wire of resistance $3\,\Omega$ is elongated to make a uniform wire of double its previous length. The new wire is now bent and the ends joined to make a circle. If two points on this circle make an angle $60^o$ at the centre,the equivalent resistance between these two points will be

Three resistors each of $4\,\Omega$ are connected together to form a network. The equivalent resistance of the network cannot be ............ $\Omega$.

In the following star circuit diagram,the equivalent resistance between the points $A$ and $H$ will be ..............$r$.

The figure shows a tetrahedron where each edge has a resistance $r$. Choose the correct statement$(s)$ related to the equivalent resistance between any two vertices.