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MHT CET202120 Sep 2021Evening ShiftPhysicsSemiconductorsActual

Silicon and copper are cooled from 300 ~K to 100 ~K , the specific resistance (resistivity)

Options

  1. Aincrease in both copper and silicon
  2. Bdecrease in both copper and silicon
  3. Cdecrease in copper and increase in silicon
  4. Dincrease in copper but decrease in silicon

Correct answer

C. decrease in copper and increase in silicon

Step-by-step solution

Resistivity of conductors increase with temperature and that of semiconductor decreases with temperature. When temperature is decreased, the resistivity of copper will decrease while that of silicon will increase.

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