Ohmic or Non-Ohmic? - Reasoning Explained

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Homework Help Overview

The discussion revolves around determining whether a given material, specifically nichrome wire, is ohmic or non-ohmic based on its resistance characteristics and the graphical representation of voltage and current. The subject area is primarily focused on electrical properties and Ohm's Law.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the relationship between voltage and current, questioning whether the resistance of the nichrome wire changes. Some discuss the implications of a non-linear graph in relation to Ohm's Law.

Discussion Status

There is an ongoing exploration of the characteristics of the nichrome wire, with some participants suggesting it is non-ohmic based on the graph's non-linear nature. However, the discussion remains open, with various interpretations being considered.

Contextual Notes

Participants are examining the implications of the graph's shape on the classification of the wire, with specific attention to the definitions and assumptions underlying Ohm's Law.

raman911
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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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