Q5 of 26 Page 1

Two metallic resistors are connected first in series and then in parallel across a d.c. supply. Plot of I – V graph is shown for the two cases. Which one represents a parallel combination of the resistors and why ?


The slope of the graph is



Where R is the resistance of the circuit.


In parallel combination, the resistance decreases, hence the slope will increase.


Therefore, line A represents parallel combination of resistors.


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