Which two of the four circuits given below are identical with respect to the current through resistor $X$ ?

In each of the following circuits, what is the equivalent resistance between $A$ and $B$ ? All resistors have same value $i . e ., R$.

(A) 

(B) 

(C) 

(D) 

(E) 

The effective resistance between points $P$ and $Q$ of the electrical circuit shown in the figure is:

In the following circuit find current delivered by $10 \mathrm{V}$ battery

The equivalent resistance between A and B in the following network is

In the network of five resistors, what should be the value of $y$ such that effective resistances between points $a$ and $b$ does not change.

Five resistors each of value $m$ are connected between points $A$ and $F$ as shown in figure. If two similar wires (resistor) are connected one between points $B$ and $D$ and another between points $C$ and $E.$ The effective resistance between points $A$ and $F$ will be

In the network of $6$ wires, each has same electrical conductance equal to $C.$ The effective resistance between $A$ and $B$ will be

The effective resistance between $A$ and $B$ (if each resistance have value $r$ ) will be