Tuesday
July 29, 2014

Homework Help: Physics

Posted by Preksha on Wednesday, June 13, 2012 at 7:09am.

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 )

or

α = (R2 - R1)/ [ R1 *( T2-T1) ]

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