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[" 31.A wire has resistance of "2.5Omega...

[" 31.A wire has resistance of "2.5Omega" at "28^(@)C" and a resistance "],[" of "2.9Omega" at "100^(@)C" .The temperature coefficient of "],[" resistivity of material of the wire is "],[[" (a) "1.06times10^(-3)C^(-1)," (b) "3.5times10^(-2)C^(-1)],[" (c) "2.22times10^(-3)C^(-1)," (d) "3.95times10^(-2)C^(-1)]]

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