A standard coil marked 2 Omega is found ...

A standard coil marked `2 Omega` is found to have a resistance of `2.118 Omega " at " 30^(@)C`. Calculate the temperature at which the marking is correct. The temperature coefficient of the resistance of the material of the coil is `0.0042 .^(@)C^(-1)`.

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A standard coil marked 5 Omega is found to have a resistance of 5.128 Omega at 30^@C . Calculate the temperature at which the marking is correct. The temperature coefficient of resistance of the material of the coil is .0042^@C^(-1) .

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