The resistivity of alloy manganin is?

Nearly independent of temperature

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Increases rapidly with increase in temperature

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Decreases with increase in temperature

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Increases rapidly with decrease in temperature

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Solution

The correct option is A Nearly independent of temperature
The resistivity of the alloy of manganin is almost independent of the change in temperature. It is because the arrangement of the atoms in alloys is very random and as the temperature changes, the randomness increases owing to their high resistivity.

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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).

Normally, solubility of a crystalline solid increase with temperature. Does it increase uniformly in all cases ? Name a substance whose solubility :

(a) increase rapidly withe temperature.

(b) increase gradually with temperature.

(d) initially increases then decreases with rise in temperature.

As the temperature increases, rate of reaction increases because:

Resistance of alloys decreases with the increase in temperature.

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