Question
An intrinsic semiconductor is converted into $N$-type extrinsic semiconductor by doping it with
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Answer
When intrinsic semiconductor (Si or Ge) is doped with a pentavalent element, e.g. $\begin{array}{ll}\text { phosphorus }( P ), & \text { a n-type extrinsic }\end{array}$ semiconductor is created because
pentavalent dopant donates one extra electron for conduction.
pentavalent dopant donates one extra electron for conduction.
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