Which one of the following statements correctly describes how the resistivity of a…
PHYSICS · Single correct · A Level · Physics · Electricity · Electricity
Problem
Which one of the following statements correctly describes how the resistivity of a typical pure metal compares with that of a typical alloy (such as manganin) over the temperature range 0∘C to 100∘C?
(a) Both metal and alloy show the same linear increase in resistivity with temperature.
(b) For the metal, resistivity increases markedly with temperature, whereas for the alloy it changes very little.
(c) For both the metal and the alloy, resistivity decreases rapidly as temperature rises.
(d) For the alloy, resistivity decreases markedly with temperature, whereas for the metal it remains almost constant.