Radio Theory N2 — Document

August 2019 — N2 — Radio Theory

N2 2019 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 48 items found 📚 1 topics

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Questions — A Preview of What to Expect in the Document

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Q1— Section header —

1.10\ in the ANSWER BOOK.

1.1The input of a transformer is called the secondary.

1.2low frequency speaker is called a tweeter.

1.3The current gain for a transistor connected in the common emitter mode is unity.

1.4Crystal oscillators are popular because of their low sensitivity.

1.5The total capacitance of three capacitors in parallel is C

1.6In a series resonant circuit consisting of R, L and C the impedance is equal to

1.7The frequency of the local oscillator in a receiver is set to the IF above the incoming frequency.

1.8The time constant of a circuit containing a resistor and capacitor in series can be derived from the formul

1.9A transistor only three terminals.

1.1010

Q2— Section header —

2.1The total charge (3\

2.2The voltage drop across each capacitor (2\ [5]5

Q3— Section header —

3.1The impedance of the circuit (6\

3.2The total current flowing in the circuit (2\

3.3The voltage dropped across the resistor, capacitor and the inductor (3\

3.4The power factor (2\

3.5The total power of the circuit (2\ [15]15

Q4— Section header —

4.1Make a neat labelled sketch of a half wave power supply. (4\

4.2Draw TWO cycles of the input and output waveforms of a half wave rectifier. (4\

4.3Name the TWO basic types of MOSFETs. (2\ [10]10

Q5— Section header —

5.1Draw a neat, labell ed circuit diagram of a stabilis ed common emitter amplifier. Use a NPN transistor. (12\

5.2Name the components that supply each of the following functions for the circuit in QUESTION .1.

5.2.1Voltage divider

5.2.2Stabilis ing circuit

5.2.3Load resistor

5.2.420

Q6— Section header —

6.1Name FOUR types of microphones. (4\

6.2Show, by means of a fully labelled sketch, the construction of a moving coil speaker. (6\ [10]10

Q7— Section header —

7.1Define AM modulation (3\

7.2Draw the input and output waveforms of a modulator. (6\

7.3What is the difference between sensitivity and selectivity, as associated with receivers (2 + 2\ (4\

7.4What is the function of a speaker (2\ [15]15

Q8— Section header —

8.1List FIVE steps to find a fault in a radio receiver (5\

8.2Give a brief description of the function of each of the following controls in an oscilloscope

8.2.1division

8.2.2division

8.2.3Brightness

8.2.4shift

8.2.515

Multiple Choice Options

C)F..2

Topics Identified

Business Plan

Mark Allocation

Total100 marks

Sections10 + 5 + 15 + 10 + 20 + 10 + 15 + 15 = 100 marks

Paper information

TitleDocument

SubjectRadio Theory

LevelN2

Document typeQuestion paper

Year2019

MonthAugust

Pages7

Downloads3

Examination context

Decade2010s

Years ago7y

SeasonWinter (SH)

Start dayThursday

Exam periodAugust 2019

Days since exam2,628

About Radio Theory 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.

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File size299.9 KB

Pages7

Archived on8 September 2026

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