Communication Electronics N4 — Document

November 2022 — N4 — Communication Electronics

N4 2022 Nated Engineering

↓ Download PDF 📄 196.5 KB

Preparing document

📋 Document Analysis

🎯 100 marks ⏱️ 3h 📄 6 pages 📝 48 items found

See full analysis

Questions — A Preview of What to Expect in the Document

This section provides a quick preview of questions from the document. It may not display every question or the complete wording of each one. For the full content, including diagrams, tables and other information, view the original PDF above.

Q1— Section header —

1.10\n the ANSWER BOOK.

1.1Kirchhoff s current law state that if several conductors meet at a point, the total current flowing away from it, i.e. the algebraic sum of the current, is zero.

1.2The strategy used in the superposition theorem is to eliminate all sources of power at the same time.

1.3The reactance of capacitors and inductors is determined by their physical construction and the applied frequency.

1.4The impedance of a series resonant circuit is equal to the circuit s total resistance.

1.5The cut off frequency of a high pass filter is a point where the gain changes from low to high.

1.6A filter is a network consisting of transformers and diodes.

1.7Carrier waves in telecommunications are used to convey voltage signal.

1.8Communication by radio is made possible by electrical energy that travels from the transmitter to the receiver in the form of electromagnetic waves.

1.9One of the advantages of amplitude modulation is that it uses a narrower bandwidth than frequency modulation.

1.1010

Q2— Section header —

2.1Define the following:

2.1.1Thevenin theorem

2.1.2

2.2Use the superposition theorem to calculate the current through the 15 resistor in FIGURE 1 below. (8\ [12]12

Q3— Section header —

3.1Name THREE characteristics of a series circuit at resonance. (3\

3.2

3.2.1requency at resonan ce (2\

3.2.2otal impedance of the circuit (1\

3.2.3andwidth (2\

3.2.414

Q4— Section header —

4.1Define a filter (2\

4.2Show with the aid of a typical low pass filter graph the representation of a pass band, cut

4.3What is an attenuator? (2\

4.4Draw a circuit diagram showing a type attenuator. (4\ [12]12

Q5— Section header —

5.1Define phase modulation (3\

5.2Give TWO advantages of phase modulation. (2 2\ (4\

5.3Explain the THREE main reasons for using single sideband (reduced carrier\ working for point to point communication.

Q6— Section header —

6.1Define the term demodulation (2\

6.2What is the function of a ratio detector (2\

6.3Draw a fully labelled circuit diagram of a ratio detector (5\ [9]9

Q7— Section header —

7.1Draw a fully labelled block diagram of an FM receiver. (5\

7.2Briefly explain the function of each stage of the receiver in

Q7— Section header —

7.3Draw a fully labelled block diagram of an FM transmitter (5\ [20] 808022420

Q8— Section header —

8.1Ground wave

8.2Space wave

8.3Sky wave

8.4Angle of arrival

8.510

Mark Allocation

Total100 marks

Sections10 + 12 + 14 + 12 + 13 + 9 + 20 + 10 = 100 marks

Paper information

TitleDocument

SubjectCommunication Electronics

LevelN4

Document typeQuestion paper

Year2022

MonthNovember

Pages7

Downloads8

Examination context

Decade2020s

Years ago4y

SeasonSpring (SH)

Start dayTuesday

Exam periodNovember 2022

Days since exam1,438

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

A TVET past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

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

identifying revision priorities

A practical revision approach

Start by completing the resource without looking at the memorandum. Review incorrect and incomplete answers afterwards and make a short revision list based on the areas that caused difficulty.

File details

File size196.5 KB

Pages7

Archived on8 September 2026

File age45d

ContributorFreeMode

Fingerprint9A9170238256

Questions and learner discussion

No questions or discussions have been posted yet.