Communication Electronics N5 — Document

April 2018 — N5 — Communication Electronics

N5 2018 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 6 pages 📝 36 items found

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Q1— Section header —

1.1A parallel resonance circuit is c onnected to a 100 V alternating current supply having a series resistance of 5 an inductor of 585 parallel to a capacitor of 120

1.1.1Draw the circuit (2\ alculate the following:

1.1ynamic impedance (2\

1.1factor of the circuit (2\

1.1urrent flowing through the capacitor (5\

1.1requency at resonance (2\

1.2Use an alternate formula to find Q in QUESTION

1.1(4\

1.3Define the coefficient of coupling (3\

1.4Consider the rules of interaction for mutually indu ctive coupled circuits. Complete the sentences below by using the word or wor ds in the list below. Write only the missing word

1.4.3(j\in the ANSWER BOOK. nduced; urrent; oupled; rimary;

1.4.1As far as the (a\... circuit is concerned the effect of the secondary circuit is as if an/a (b\... has been added in series with the primary (4\

1.4.2The (e\... indu ced in a secondary circuit by the primary (f\... as a magnitude of WMIp and (g\ ... behind the current by 90 (3\

1.4.3The (h\ ... current is exactly the same current that will flow if the ... voltage was applied in series with the secondary circuit and the primary (j\ ... was absent. (3\

Q2— Section header —

Q3— Section header —

3.1Design TWO types of high pass filters consisting of a T filter and a TT filter with an impedance of

3.2Determin e the cut off frequency of the low pass filter in FIGURE 1 with an inductor

Q4— Section header —

4.1Ide nti fy the TWO phasor diagrams in FIGURE 2 by writing the answer next to the question number (4.1.1

4.1.2\the ANSWER BOOK.

4.1.1

4.2Label the components of the diagram

Q4— Section header —

4.3Give THREE differences between each of the following transmitters:

4.3.1Double id eband

4.3.2Single sideband (2 (6\

4.4Use the Bessel Function Table below to determine the bandwidth required for an FM signal in which the modulation frequency is 5 KHz and the maximum deviation is 15 KHz. (4\ [20] J020

Q5— Section header —

5.1Give TWO disadvantages of a half wave dipole. (2\

5.2Define effective aperture of an antenna. (3\ [5]5

Q6— Section header —

6.1entify the TWO RC circuits in FIGURE 2 and FIGURE 3. FIGURE 2 FIGURE 3 (2\

6.2Explain the main common function

Q6— Section header —

Mark Allocation

Total100 marks

Sections30 + 30 + 10 + 20 + 5 + 5 = 100 marks

Paper information

TitleDocument

SubjectCommunication Electronics

LevelN5

Document typeQuestion paper

Year2018

MonthApril

Pages12

Downloads4

Examination context

Decade2010s

Years ago8y

SeasonAutumn (SH)

Start daySunday

Exam periodApril 2018

Days since exam3,116

About Communication Electronics examination preparation

This TVET examination resource can be used as part of a structured revision programme. Past papers are most useful when learners attempt questions independently, work within a realistic time limit, and review their answers afterwards.

How to use this resource for revision

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For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

applying subject knowledge

working under time constraints

checking answers

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A practical revision approach

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