Answer to Question #85546 in Electric Circuits for James

Question

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. (Explain your answer using an appropriate
expression.)

Answer 1

Since according to Ohm's law the voltage is

$$V=RI,$$

just take resistance and current at the required point and multiply them.