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 graph (are) correctly labelled in term of the words 'series' and 'parallel' justify your answer
Answers
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
may b helpful
Answer:
In the first graph, slope of V-I graph is resistance. Since, in series combination, resistance is more than the resistance in parallel combination, therefore slope of V-I graph for series combination is more than the slope oiV-I graph for parallel combination. Hence, first graph is correctly labelled.
In the second graph, slope of I-V graph is 1/resistance. Hence, second graph is also correctly labelled.
Explanation:
By ohm's law, V=IR
In first graph slope= V/I=R. so greater the resistance, greater the slope or inclination. We know R in series is greater than in parallel so its inclination will be greater and thus the first graph.