The values of current I flowing in a given resistor for the corresponding values of
potential difference V across the resistor are given below –
Plot a graph between V and I and calculate the resistance of that resistor.
The plot between voltage and current is called IV characteristic. The voltage is plotted on x-axis and current is plotted on y-axis. The values of the current for different values of the voltage are shown in the given table.
|I (amperes )||0.5||1.0||2.0||3.0||4.0|
The IV characteristic of the given resistor is plotted in the following figure.
The slope of the line gives the value of resistance (R) as,
Slope = 1/R = BC/AC = 2/6.8
R= 6.8/2 = 3.4 Ω
Therefore, the resistance of the resistor is 3.4 Ω.
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- Electric Potential Difference