Draw a schematic diagram of common domestic circuit.

                                 $\left(A\right)$                                                                                    $\left(B\right)$

To study the dependence of current ($I$), on the potential difference ($V$) across a resistor $R$, two students used the two set ups shown in figure $A$and $B$respectively. They kept the contact point $J$in the four different positions marked (1), (2), (3) and (4) in the two figures. For both the students, the ammeter and voltmeter reading will be maximum when the contact $J$is in the position.

(A)

(B)

To study the dependence of current ($I$), on the potential difference ($V$) across a resistor $R$, two students used the two set-ups shown in figure $A$and $B$respectively. They kept the contact point $J$in the four different positions marked (1), (2), (3) and (4) in the two figures. In the above experiment if a graph is drawn between $V$ and $I$, what will be the nature of graph? Draw the graph.