Question

How does the resistivity of a metal wire change if either the number of electrons per...

How does the resistivity of a metal wire change if either the number of electrons per unit volume increases or the mean free time increases?

Group of answer choices

A. In both cases, the resistivity will decrease.

B. Increasing the number of electrons will decrease the resistivity, but it will increase if the mean free time increases.

C. In both cases, the resistivity will increase.

D. Increasing the number of electrons will increase the resistivity, but it will decrease if the mean free time increases.

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Homework Answers

Answer #1

(a) If we increase n, ρ will decrease as it is inversely proportional to n

If we increase τ, ρ will decrease as it is inversely proportional to τ.

Therefore, resistivity will decrease in both the cases.

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