23.2 Temperature Coefficient of Resistance

The resistance of a conductor changes with its temperature. The temperature coefficient a is given by

where R₀ = Resistance at 0⁰C

R_t = Resistance at t⁰C

Solved Problem

1. A calorimeter of mass 50gm and specific heat capacity 0.1cal / gm ⁰C contains water of mass 100 gm; initially the system is at 30⁰C. For how long should a 3 Amp current 110 volt be passed through the water so that the final temperature of system becomes 70⁰C?

Solution

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Index

23.1 Joule's Law
23.2 Temperature Coefficient of Resistance

Chapter 24