The resistivity of alloys is ______ than its constituent elements.

higher

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lower

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same

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none of these

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Solution

The correct option is A higher
Metal alloy has greater resistivity than the corresponding metals because of lattice distortion from the alloying elements. A metal with no alloying elements would transport electron by drift oscillation over the lattice.
Difference in atomic radii of alloying elements and in electronegativity from base metal, the presence of alloying element changes locally electronic structure of base metal. Such change modulates the typical drift oscillation mechanism in electron conduction by scattering and leads to higher resistance.

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Similar questions

Choose the correct alternative:

(a) Alloys of metals usually have (greater/less) resistivity than that of their constituent metals.

(b) Alloys usually have much (lower/higher) temperature coefficients of resistance than pure metals.

(d) The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of (10²²/10³).

X

Y,

X

Y .

8 Ω

2 Ω .

65 c m

4 Ω,

260 c m

16 Ω .

440 A .

Identify the alloy containing a non-metal as a constituent in it

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