Question : Silicon doped with gallium forms_________.
Option 1: n-type semiconductor
Option 2: superconductor
Option 3: insulator
Option 4: p-type semiconductor
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Correct Answer: p-type semiconductor
Solution : The correct answer is a p-type semiconductor.
Silicon doped with gallium forms a p-type (positive-type) semiconductor. When gallium is introduced as a dopant into silicon, it creates an excess of "holes," or positive charge carriers, in the silicon crystal structure. This results in a p-type semiconductor that conducts electricity with positive charge carriers; the n-type semiconductor conducts electricity with negative charge carriers (electrons).
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