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When we are supposed to calculate the value of "temperature coefficient of resistance " i.e. α , how are we supposed to choose between the following two formulae :

α = (R2 - R1) / (R1*T2 - R2* T1 )


α = (R2 - R1)/ [ R1 *( T2-T1) ]

  • Physics - ,

    Use the second equation. The other one is not the correct definition.

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