The resistivity of a metal is a function of temperature because_____________?
Correct answer: A. the amplitude of vibration of the atoms varies with temperature
- A. the amplitude of vibration of the atoms varies with temperature
- B. the electron density varies with temperature
- C. the electron gas density varies with temperature
Explanation
As temperature rises, lattice atoms vibrate with greater amplitude and scatter conduction electrons more strongly, increasing resistivity. Electron density changes much less and is not the principal cause in metals.
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