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In general, resistivity of an alloy .......

In general, resistivity of an alloy ........... its constituent metals.

A

has no correlation to

B

is higher than

C

is lower than

D

is same as

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The correct Answer is:
B
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The resistance of an alloy

If the resistivity of an alloy is ____ and that of constituent metal is p, then

If the resistivity of an alloy is rho' and that of consituent metals is 'rho' then

Alloys of metals have greater resistivity than that of their constituent metals. Why?

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)) .

The resistivity of alloy manganin is

The resistivity of alloys is usually

A :Alloys of metals usually have greater resistivity than that of their constituent metals. R : Alloys usually have much lower thermal coefficient of resistance than pure metals.

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