Correct Option is (C)
Resistivity of conductors increases with temperature and that of semiconductor decreases with temperature.
When temperature is decreased, the resistivity of copper will decrease while that of silicon was increase.
6. ⇒ (MHT CET 2021 20th September Morning Shift )
Silicon and copper are cooled from 300 K to 100 K, the specific resistance (resistivity)
A. increases in both copper and silicon
B. decreases in both copper and silicon
C. decreases in copper and increases in silicon
D. increases in copper and decreases in silicon