The resistance of a metallic conductor is `2Omega at 30^@C`. Calculate its resistance at a temperature of `130^@C`. `(Given alpha = 4 xx 10^-3 k^-1)`

The resistance of a metallic wire is 10Omega at 9^@C . Calculate its resistance at a temperature of 100^@C . Gien a = 3.9 xx 10^-3 K^-1

The resistance of a metal wire of length 1m is 3 ohm. The diameter of the wire is 0.2 m. Calculate the resistivity of the metal at the temperature.

A brass scale is correct at 20^@C . The length of a rod measured by it at 35^@C is 60 cm . What is the correct length of rod at that temperature ? ( alpha of brass = 18.9 xx 10^(-6) per^@C) .