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  4. A small impurity is added to germanium to get a n-type semiconductor. This impurity is a

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Q. A small impurity is added to germanium to get a $n-type$ semiconductor. This impurity is a

JIPMERJIPMER 2015Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

$n$-type semiconductor is obtained when Si or Ge (tetravalent) is doped with pentavalent impurities like As, Sb, P etc.