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Question
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) | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 | 5.0 |
| I (amperes) | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1.0 |
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor.
Solution
The plot between current (I) and potential difference (V) is given as,
Resistance of the resistor = Slope of the above graph
Chose two points A and B on the graph,
Slope of the graph is = Slope of line AB = `(4-1)/(0.8-0.2) = 3/0.6` = 5 Ω
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