Question

suppose in an experiment data is collected or a variation of current with resistance r is the plot of our business I in this is made how does one determine the value of V from that graph explain your answer is 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.

Graph

Other graph collection of data

$R=\frac{∆V}{∆I}$

$R=\frac{10.2-3.4}{3-2}=6.8\Omega$