Semiconductor Materials » Exercise – 2
71. A hole is the vacancy created when :
(a) Free electron moves on application of electric field
(b) An electron breaks its covalent bond
(c) An atom core moves
(d) An electron reverts from conduction band to valency bandSubject Name : Electronics Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant Electronics & Communication Engineering Books
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