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Ohms law can be sated as V=IR. a. Suppose in an experiment, data is collected of the variation of current with resistance R. Next a plot of R vs I -1 is made. How does one determine the value of V from that graph.

Joshua Attih
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  • This sounds like a standard practical for finding the emf $\mathcal E$ and internal resistance of a cell $r$ with $\mathcal E = I(r+R) \Rightarrow R= \mathcal E I^{-1} -r$. From the graph of $R$ against $I^{-1}$ the two unknowns can be found. – Farcher Mar 21 '18 at 08:18

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One possibility would be to plot different points of (R, 1/I) and then solve for I and then multiply R by I to get V. I don’t believe there is any other way...

NL628
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