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DTEL 211 Electronics Final Examination

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Trust Academy
In collaboration with MSU
Diploma in Telecommunications DTEL
&
Diploma in Networking and PC Engineering DNEP
Final Examination-
DTEL 211: ELECTRONICS EXAM 3
Time: 2 Hours
Instructions to candidates
1. Answer all questions section A. The section carries 40 marks.
In section B answer any three. Each question carries 10 marks
Section A
1(a) Define the operational amplifier
(b) Give the three chief properties of the operational amplifier (3)
(c) Explain the terms p type and n-type semiconductors (3)
(d) Explain the term negative feedback (2)
2(a) Draw a block diagram for an oscilloscope (4)
(3). Distinguish between
(a) Multimode and monomode fibres (2)
(b) Step index and graded index fibres (2)
(c) Explain why the signal to noise ratio does not remain constant along the cable for fibre (4)
(e) Describe the structure and operation of a p-i-n photodiode (4)
4(a) Explain what is meant by a step index optic fibre (2)
(b) Explain what is meant by noise (2)
(c) State the two main of optical fibres (2)
(d) Give the four uses of lasers (4)

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Trust Academy In collaboration with MSU Diploma in Telecommunications DTEL & Diploma in Networking and PC Engineering DNEP Final ExaminationDTEL 211: ELECTRONICS EXAM 3 Time: 2 Hours Instructions to candidates 1. Answer all questions section A. The section carries 40 marks. In section B answer any three. Each question carries 10 marks Section A 1(a) Define the operational amplifier (b) Give the three chief properties of the operational amplifier (3) (c) Explain the terms p type and n-type semiconductors (3) (d) Explain the term negative feedback 2(a) Draw a block diagram for an oscillosco ...
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