Electrical Technology Digital Electronics Memo 1 (English)

May-June 2026 — Grade 12 / Matric — Electrical Technology

Memo 2026 Grade 12 English

↓ Download PDF 📄 307.9 KB View Exam Paper

Preparing document

📋 Document Analysis

🎯 20 marks 📄 5 pages 📝 78 items found 📚 2 topics

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.

2.1All calculations must show the formulae.

2.2Substitution of values must be done correctly.

2.3All answers MUST contain the correct unit to be considered.

2.4Alternative methods must be considered, provided that the correct answer is obtained.

2.5Where an incorrect answer could be carried over to the next step, the first answer will be deemed incorrect. However, should the incorrect answer be carried over correctly, the marker has to re calculate the

Q1— Section header —

1.1(1\

1.2(1\

1.3(1\

1.4(1\

1.5(1\

1.6(1\

1.7(1\

1.8(1\

1.9(1\

1.10(1\

1.11(1\

1.12(1\

1.13(1\

1.14(1\

1.15(1\ [15] Electrical Technology: Power Systems DBE/May/June 202 SC/NSC15

2.1It is an unsafe act. (1\

2.2Any person who employs or provides work for any person and remunerates that person. (2\

2.3It is when an attempt is made to numerically determine the probability of various adverse events and the likely extent of the losses if a particular event tak es place. (2\

2.4Human rights ensure that human dignity is not infringed and that everyone is treated with respect, have equal opportunities and are not exploited in the workplace. (2\

2.5When the employee feels personally responsible for his/her job performance, he/she shows up on time, puts in his/her best effort and completes projects to the best of his/her ability keeping production high.

3.1.1Impedance is the total opposition to the flow of current in an AC circuit comprising of resistance and reactance. (2\

3.1.2Resonant frequency is a specific frequency at which inductive reactance is equal to the capacitive reactance. (2\

3.1.3In a parallel RLC circuit at resonance the impedance is maximum and current minimum. (2\

3.23. .1 The current through the inductor lags the voltage across it. (1\ 3. .2 (3\

3.2.3(3\

3.2.4(3\

3.2.5(3\

3.2.6(3\ Electrical Technology: Power Systems DBE/May/June 202 SC/NSC Marking Guidelines Copyright reserved

3.3(4\

3.4.1(3\

3.4.2(3\

3.4.3(3\ [35] 310,76 V35

4.1Hydro power generation. Wind power generation. Solar power generation.

4.2Two voltages are available, namely and PH For the same power rating, three phase motors are cheaper, more efficient,

4.3Less current drawn from the supply. Cost saving from drawing less current. Less heat is generated. Maintenance is reduced due to the motor operating cooler. Longer life span of the load.

4.4A three phase supply is generated when three coils are placed 120 apart and

4.5.1(3\

4.5.2(3\ 4. .3 OR (3\ Electrical Technology: Power Systems

4.5.4OR (3\ 4. 4. .1 The product of the two instruments will provide the

4.6.24. .3 A wattmeter measures the electrical power consumed by an application.

4.6.4Zero Amperes (1\

4.7Low power factor increases the total current for a given power, increases the resistance losses and therefore decreases the efficiency of both apparatus and supply systems. Limits the output of both generators and transformers.

4.8.1Power factor meter (1\

4.8.2Voltage transformer. Current transformer. (2\

4.8.3An addition of inductive loads to the system will decrease the reading displayed on the instrument. (1\ [35] Electrical Technology: Power Systems DBE/May/June 20235

5.1Transformation is the way in which transformers increases voltage from a low to a high voltage or decreases voltage from a high voltage to a low voltage. (2\

5.2.1FIGURE ore type FIGURE B Shell type (2\

5.2.2An iron core is needed to provide a magnetic field path to concentrate the magnetic field lines within the core material for maximum induction and power transfer to the secondary windings (2\

5.3Oil forced; Water forced (OFWF\ Oil forced; Air forced (OFAF\ Oil Natural; Air Natural (ONAN\ Oil Natural; Air forced (ONAF\ Oil forced; Air Natural (OFAN\ (2\

5.4Size Frequency Windings ratio Voltage Power factor Efficiency (2\

5.5.1(3\ 5. .2 (3\ 5. .3 OR

5.5.4(3\

5.5.5(3\

5.6.1Using three transformers is bulky or more expensive. (1\

5.6.2Single phase transformers connected in a star delta configuration are used as step down transformer

5.6.3To be able to match the incoming power and to transform the incoming voltage level needed in the correct phas sequence or polarity.

6.1In a three phase motor, induction refers to the process where a rotating magnetic field created by the stator windings induces an emf in the rotor

6.2.1Full load speed is the speed at which the rotor rotates when maximum load is connected to the motor shaft. 6.

6.3Check if the: Shaft rotates freely. Bearings turn smoothly when the shaft is turned. Bearing housings are free from excess grease or dust. (2\

6.4.1(3\

6.4.2OR (3\ Electrical Technology: Power Systems 12 DBE/May/June 202 SC/NSC Marking Guidelines

6.4.3(3\

6.5NOTE: If a learner redrew the diagram as given and swop the labels of L and L

6.6.1N/C Timer normally closed contact (1\

6.6.2MC N/C is used as a normally closed interlocking contact ensuring the star contactor MC gets energised when the start button is pressed and de

6.6.3To reduce the starting voltage. To reduce starting current by 1/3 of delta current To ensure that there is safe transition when switching from star to delta. To protect the wiring in the circuit from burning

6.6.4When the start button is pressed MC energise which closes MC N/O and latches MC

7.1Relays require regular maintenance and repair. Uses much more energy. It requires a lot of space to be wired. It has slower response time. When a single relay develops faults in a panel, it takes much time to locate and

7.2Detection and positioning of objects Measuring rotating speed Counting objects on a conveyer Dete cting direction (2\

7.3Soft wired systems are cheaper when modifications to the system are made Instead of buying new devices, the program is simply altered. (2\

7.4Transistor (1\

7.5A hard wired contactor is a high current device with additionally connected auxiliary contacts used to switch high current devices on the output of a PLC unit to drive the load. A soft wired contactor as used within the software program of the PLC is a virtual

Topics Identified

CircuitsMachines

Mark Allocation

Total200 marks

Sections15 + 10 + 35 + 35 + 30 + 35 + 40 = 200 marks

Paper information

SubjectElectrical Technology

Year2026

SessionMay-June

TypeMemo

PaperPaper 1

LanguageEnglish

Pages15

Downloads3

Examination context

Decade2020s

Years ago0y

Season—

Start day—

Exam period—

Days since exam—

About Electrical Technology examination preparation

This Grade 12 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 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.

Grade 12 subject hubs

Each matric subject has its own dedicated hub on Freemode with every past paper and marking memorandum we have archived for that subject.

➗ Mathematics View papers → 📊 Mathematical Literacy View papers → ⚗️ Physical Sciences View papers → 🧬 Life Sciences View papers → 📒 Accounting View papers → 💼 Business Studies View papers → 📈 Economics View papers → 🌍 Geography View papers → 🏛️ History View papers → 📖 English View papers → 🇿🇦 Afrikaans View papers → 🗣️ IsiNdebele View papers → 🗣️ IsiXhosa View papers → 🗣️ IsiZulu View papers → 🗣️ Sepedi View papers → 🗣️ Sesotho View papers → 🗣️ Setswana View papers → 🌾 Agricultural Sciences View papers →

Corresponding examination paper

Examination paper available

Open the corresponding examination paper to practise the questions before reviewing the marking memorandum on this page. Attempt every question under timed conditions for the most realistic preparation.

Electrical Technology Digital Electronics Paper 1 (English) →

File details

File size307.9 KB

Pages15

Archived on11 October 2026

File age12d

ContributorFreeMode

Fingerprint510C7513D890

Questions and learner discussion

No questions or discussions have been posted yet.