A piece of carbon and a piece of copper have the same resistance at room temperature.
(a) If the temperature of each piece is increased by 10.0oC, will the copper piece have (1) a higher resistance than, (2) the same resistance as, or (3) a lower resistance than the carbon piece? Why?
(b) Calculate the ratio of the resistance of copper to that of carbon at the raised temperature.
(c) Assuming they have the same voltage across them, calculate the ratio of the current in the copper compared to the carbon at the raised temperature.
(d) Repeat part (c) for the ratio of the power delivered.

  • CreatedAugust 29, 2015
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