Industrial Electronics N4 — Memo

November 2023 — N4 — Industrial Electronics

N4 2023 Nated Engineering

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Q1— Section header —

1.1

1.2

Q2— Section header —

2.1

2.2.1The ability of an inductor to oppose a change in current

2.2.2The quality factor of a circuit or component at resonant frequency he ratio of the reactance of the inductor or capacitor to its equivalent resistance

2.2.3he phasor sum of the reactance and the resistance

2.2.4he angle between the applied voltage and the circuit current

2.2.5

2.3.179 780 (3\

2.3.2At resonance: =1 = 2 0, 127 898

Q3— Section header —

3.1The positive side attracts electrons from the N type material and the negative side attracts holes from the P type material.

3.1.2

3.2.5

Q4— Section header —

4.1.1True

4.1.2False

4.1.3True

4.1.4False

4.1.5

4.2.194 79 54 72

4.2.311

Q5— Section header —

5.1By applying a small forward bias to the base of the transistors (1\

5.2.5(5 (5\

5.3.1out Ap = 10 log = 10 log 500 10 -3 = 30 dB

5.3.2= 20 log but V 500 70,717 = 20 log = 70,717 = 16,99 dB

Q6— Section header —

6.16

Q7— Section header —

7.1Reference Input (4\

7.2When the core moves either up or down, there will be more induced voltage in that secondary coil. The magnitude of the output voltage is proportional to the core displacement. (3\

7.3It allows only positive pulse to the gate of an SCR and prevents negative pulses from going to the gate. (2\ [9]9

Q8— Section header —

8.1The area of the plates The distance between the plates [10] Trigger circuit SCR10

Q9— Section header —

9.1It causes the display to drift across the screen making measurement difficult (2\

9.2Heater Control grid Accelerating anode Converting beam Diverging beam (5\

9.3Audio frequency generation

9.4.1

9.4.214

Mark Allocation

Sections11 + 18 + 11 + 12 + 6 + 9 + 10 + 14 = 91 marks

Paper information

TitleMemo

SubjectIndustrial Electronics

LevelN4

Document typeNated Engineering

Year2023

MonthNovember

Pages7

Downloads3

Examination context

Decade2020s

Years ago3y

SeasonSpring (SH)

Start dayWednesday

Exam periodNovember 2023

Days since exam1,075

About Industrial Electronics examination preparation

Industrial Electronics covers semiconductor devices, amplifiers, power supplies, and digital logic circuits. The examination tests both theoretical knowledge and practical circuit analysis.

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.

semiconductor theory

circuit analysis

component identification

digital logic principles

interpreting circuit diagrams

A practical revision approach

Practice circuit analysis with correct formulae and units. The memorandum rewards accurate calculations, correct component identification, and proper interpretation of circuit diagrams.

File details

File size352.7 KB

Pages7

Archived on8 September 2026

File age47d

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Fingerprint4679EE95478F

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