Home
Class 12
PHYSICS
Of metals and alloys, which has greater ...

Of metals and alloys, which has greater value of temperature co-efficient of resistance ?

Text Solution

Verified by Experts

The value of temperature co-efficient of resistance `(alpha)` is more for metals than for alloys. For example, in case of copper, `alpha = 4 xx 10^(-3).^(@)C^(-1)` and for manganin, `alpha = 15 xx 10^(-6).^(@)C^(-1)`.
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    PRADEEP|Exercise Conceptual Problems|3 Videos

  • CURRENT ELECTRICITY

    PRADEEP|Exercise Very short Q/A|7 Videos

  • COMMUNICATION SYSTEMS

    PRADEEP|Exercise MODEL TEST PAPER-2|9 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    PRADEEP|Exercise Exercise|191 Videos

Similar Questions

Explore conceptually related problems

Out of copper and nichrome, which has the larger value of temperature coefficient of resistance?

Which of the following has negative temperature coefficient of resistance?

An alloy having zero temperature coefficient of electrical resistance is _______.

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 resistance of the bulb filament is 100Omega at a temperature of 100^(@)C . If its temperature co-efficient of resistance be 0.005 per 5 ""^(@)C , its resistance will becomes 200 Omega at a temperature

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.