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Which of the following, when added as an impurity, into the silicon, silicon, produces n-type semi-conductor?
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- Phosphorous
- Aluminium
- Magnesium
- Both b and c
Correct Option: A
Phosphorous (P) is pentavalent and silicon is tetravalent. Therefore, when silicon is doped with pentavalent impurity, it forms a n-type semiconductor.