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DTEL 211 Electronics Final Examination

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Engineering

Course

DTEL 211

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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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Tags: negative feedback the operational amplifier P i n photodiode monomode fibres closed loop gain

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