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  • While studying the dependence of potential difference (V) across a resistor on the current (I) passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and plotted a graph betwe

While studying the dependence of potential difference (V) across a resistor on the current (I) passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and plotted a graph between V and I . He got a straight line graph passing through the origin. What does the straight line signify ? Write the method of determining resistance of the resistor using this graph.

 

 

 

 
 
 
 
 

Answers (1)

When the student took 5 readings for different values of R and the student gets a straight line graph.

This verifies Ohm's law.

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points

So, if you plot a graph of current against voltage you will get:

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