The ratio frac text k sigma text T (where k is...

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The ratio $$\frac{{\text{k}}}{{\sigma {\text{T}}}}$$ (where k is the thermal conductivity, σ is the electrical conductivity and T is the temperature) for metals

A. is strongly dependent on the number density of the charge carriers

B. is independent of the temperature T

C. varies widely from one metal to another

D. is approximately independent of the particular metal

Answer: Option A

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