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shows a circuit used in an experiment to...

shows a circuit used in an experiment to detrmine the emf and interanl resistance of the battery C. A graph was plotted of the potential difference V between the terminals of the battery against the current I, which was varied by adjusting the rheostat. The graph is shown in x and y are the intercepts of the graph with the axes as shown. What is the internal resistance of the battery?

A

x

B

y

C

x/y

D

y/x

Text Solution

Verified by Experts

The correct Answer is:
D
d. As `V = epsilon - Ir`
From graph it is clear that slope `= -r = -y//x`
or `r = y//x`.
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