MHT CET Physics question

Not in JEE Advanced syllabus

Doping materials are called impurities because

(A)They make semiconductors less pureCorrect
(B)They alter the crystal structure
(C)They change chemical properties
(D)They change the number of charge carriers

Answer: (A)

Solution

Dopant atoms are foreign atoms present in an otherwise pure crystal, so they reduce its purity, which is why they are called impurities; the crystal structure remains essentially the same (b is

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Question ID VK-085364