Explain why the points on a potential difference–current graph for a metallic…

PHYSICS · Subjective · A Level · Physics · Electricity · Electricity

Problem

Explain why the points on a potential difference–current graph for a metallic resistor may not fall exactly on a straight line even when the experiment is performed carefully.

Related theory

Temperature Dependence of Resistivity
Resistance & Resistivity
Ohm's Law (Macroscopic)
Ohm's law, V-I graphs and ohmic/non-ohmic conductors
Current Electricity
Ohm's law and V-I graphs
Ohm's law and its limitations
Electricity

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