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KAIBOI TECHNICAL TRAINING INSTITUTE
DEPARTMENT: ELECTRICAL AND ELECTRONICS TE
CH T NO EN LO G RM Y FO WE R S E L F E M PO
CLASS: ELC 23J
SUBJECT: ELECTRONICS EXAM: MARCH EXAM SERIES NO OF STUDENTS: 18 DURATION: 2HRS LECTURER: MDM SHARON
INSTRUCTIONS TO CANDIDATES Answer all the THREE questions provided Diagrams should be neat and clear
Page 1 of 2 QUESTION ONE a) Define the following terms I. Atom II. Valence III. Amplifier IV. Extrinsic semi-conductors V. Intrinsic semi-conductor (10 marks) b) Explain the 4 characteristics of amplifiers. (8 marks) c) Describe distortion in amplifiers. (2 marks)
QUESTION TWO a) Differentiate between conductors and semi-conductors giving examples. (4 marks) b) Explain the term doping as applied in a semi-conductor. (2 marks) c) State three applications of bipolar junction transistor. (3 marks) d) Describe the operation of capacitors with an aid of a diagram. (6 marks) e) Name 5 electronic components giving their symbols. (5 marks)
QUESTION THREE a) Explain the characteristics of a Zener diode. (10 marks) b) With an aid of a diagram describe the operation of a bridge rectifier diode. (10 marks)
