Question

Two students perform the experiment on series and parallel combinations of two given resistors R₁ and R₂ and plot the following V-I graphs (a) and (b). 

Which of the graphs is (are) correctly labelled in terms of the words 'series' and 'parallel'? Justify your answer"

Answer 1

(a) slope=Resistance R
As larger resistance represents series combination and smaller resistance the parallel combination. Therefore, a graph of greater slope represents series combination and hence it is correctly labelled.
(b) Slope, I/V=1/R
As larger resistance represents series combination, sograph of smaller slope represents series combination and hence it is also correctly labelled.