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Question

Four students performed experiments on series and parallel combination of two given resistors R1 and R2 which obey Ohm's law and plotted the following V-I graphs:



Which of the graph is correctly labeled in terms of 'series' and 'parallel'?
(1) graph A
(2) graph B
(3) graph C
(4) graph D

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Solution

According to Ohm's law, V=IR or I =1R V

From , we can say the graph between 'I' and 'V' will be a straight line, and the slope of the graph will be equal to 1R. Net resistance in series combination is more than the net resistance in parallel combination, hence the slope will be less for series combination and more for the parallel combination.

Hence, the correct answer is option 1.

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