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The resistivity of alloy manganin is...

The resistivity of alloy manganin is

A

Nearly independent of temperature

B

Increases rapidly with an increase in temperature

C

Decreases with increase in temperature

D

Increases rapidly with a decrease in temperature

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Choose the correct alternatives : (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. (c ) The resistivity of the alloy manganin in (nearly independent of/ increase rapidly ) with increase of temperature. (d) The resistivity of a typical insulator (e.g. amber) is greater than that of a metal by a factor of the order of (10^(22) or 10^(3)) .

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