The values of current (I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are as given below :
V (Volts)
I (Amperes)
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor.

The plot between current $(I)$ and potential difference $(V)$ is given as-

Resistance of the resistor (R) = Slope of the above graph

Choose any two points P and Q on the graph,

Resistnce of the resistor (R) = Slope of line $PQ=\frac{4-1}{0.8-02}=\frac{3}{0.6}=\frac{30}{6}=5\Omega $

Alternate Solution

We know that-

$R=\frac{\Delta V}{\Delta I}$


$R$ = Resistance

$V$ = Potential difference or Voltage

$I$ = Current

$\Delta $ = shows change

Putting the given values we get-




$R=5\Omega $

NOTE: For every point on the graph, the resistance will remain the same.


Simply Easy Learning

Updated on: 10-Oct-2022


Kickstart Your Career

Get certified by completing the course

Get Started