Given below are two statements
Statement I 
-type semiconductor is electrically neutral.
Statement II 
-type semiconductor has an excess of negative charge carriers.
In the above statements, choose the most appropriate answer from the options given below
Text Solution
Verified by ExpertsNOT AVAILABLE
In 
-type semiconductor, the pentavalent impurity atom shares four of its valence electrons with four 
or 
atoms, while its fifth electron remains free. Thus, 
-type semiconductor has an excess of negative charge carriers (electrons). Since, amount of positive and negative charges in 
-type semiconductor are equal, thus net charge on 
-type semiconductor is zero. Hence, 
-type semiconductor is electrically neutral.
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