Question:
Which one of the following schematic curves best represents the variation of conductivity \( \sigma \) of a metal with temperature \( T \)?
Which one of the following schematic curves best represents the variation of conductivity \( \sigma \) of a metal with temperature \( T \)?
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In metals, the conductivity typically decreases with increasing temperature due to increased scattering of conduction electrons.
Updated On: Dec 15, 2025
- A
- B
- C
- D
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the relationship between conductivity and temperature.
In most metals, as temperature increases, the conductivity decreases due to increased lattice vibrations which scatter electrons. This results in a negative temperature coefficient of resistance. The graph that best represents this relationship is a decreasing curve, corresponding to option (B).
Step 2: Conclusion.
Thus, the correct answer is option (B) because conductivity decreases with increasing temperature in metals.
In most metals, as temperature increases, the conductivity decreases due to increased lattice vibrations which scatter electrons. This results in a negative temperature coefficient of resistance. The graph that best represents this relationship is a decreasing curve, corresponding to option (B).
Step 2: Conclusion.
Thus, the correct answer is option (B) because conductivity decreases with increasing temperature in metals.
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