47 Thermal energy can shift some of the electrons in a hot semiconductor from va

Question

47 Thermal energy can shift some of the electrons in a hot semiconductor from valence levels to conduction levels. What effect do these shifts have on the semiconductor's ability to conduct electricity? A. It decreases the resistance because any given voltage will set more charges in motion to form a current. B. It increases the resistance because atomic vibrations obstruct the flow of charges. C. The semiconductor melts, so there is only a brief positive effect followed by an inevitable breakdown. D. The two effects in A and B happen at the same time and cancel each other, so there is no change

Explanation / Answer

As temperature increased the resistance of semiconductor decreases as now there are more current carrier in conduction band. so option A is right.

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