Question

The V-I graph for a series combination and for parallel combination of two resistors is shown in figure. Which of the two A or B, represent parallel combination? Give reason for your answer.

Answer 1

i) For same change in I, change in V is less for the straight line A than for the straight line B (i.e., straight line A is less steeper than B). 

ii) So the straight line A represents small resistance, while straight line B represents more resistance.

iii) In parallel combination, the resistance decreases, while in series combination, the resistance increases, so A represents a parallel combination.