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Alloys of metals usually have greater resistivity than that of their constituent metals

Alloys usually have much lower temperature coefficients of resistance than pure metals

The resistivity of the alloy manganin is nearly independent of temperature

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answer is D.

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Detailed Solution

Alloys generally have greater resistivity and very low-temperature coefficients.

Manganin has a very low-temperature coefficient the resistivity is nearly independent of temperature.

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