Ohmic or Non-Ohmic? - Reasoning Explained

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The discussion concludes that the nichrome wire is non-ohmic because the graph of its voltage and current relationship is not linear. This indicates that the wire does not obey Ohm's Law, which requires a direct proportionality between voltage and current. Since the graph is not a straight line, the resistance of the wire changes with varying voltage and current. Ohm's Law specifically states that for ohmic materials, the voltage and current should produce a linear relationship. Therefore, the findings confirm the non-ohmic behavior of the nichrome wire.
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Does its resistance change?
 
What we found: The graph is not a straight line which shows that the nichrome wire does not obey Ohm's Law, that is, it is non-ohmic.
 
As the relationship is not linear, the graph is NON OHMIC.

Ohms law states that the Voltage (Potential Difference) and Current of a circuit are both DIRECTIONALLY PROPORTIONAL to each other - therefore a graph produced displaying the relationship between the two would be linear.

Hope this helps!
 

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