The temperature coefficient of resistivity is a quantity that is:
A)always positive.
B)always non-negative.
C)sometimes negative.
D)represented by the symbol σ.

Question

Quizplus · Accepted Answer

The temperature coefficient of resistivity can be negative for some materials. This means that their resistance decreases with an increase in temperature. Therefore, choice (A) is incorrect because it implies that the coefficient is always positive. Choice (B) is also incorrect because it does not account for the possibility of a negative coefficient. Choice (D) is incorrect because the symbol σ usually represents conductivity, not the temperature coefficient of resistivity.

The Temperature Coefficient of Resistivity Is a Quantity That Is