Industrial Electronics N1 — Document
April 2021 — N1 — Industrial Electronics
N1
2021
Nated Engineering
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Questions — A Preview of What to Expect in the Document
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Q1— Section header —
1.1Draw a fully labelled sketch showing TWO bar magnets placed in such a way that the north pole fac
1.2Name FOUR factors influenc ing resistance. (4\
1.3rief ly expla in electromagnetic ind uction (4\
1.4A relay is an example of an electromechanical switch. Draw a fully labelled sketch of a relay , includin g the external con tacts (6\
1.5Draw circuit diagra m of a bridge rectifier circuit showing ll labels and waveforms on the diagram.
Q2— Section header —
2.1Define each of the following terms regard ing atomic theory
2.1.1Ion
2.1.2Ionisation
2.1.3Cation
2.1.4Anion
2.1.5
2.2Draw THREE separate diagrams to indicate how the following measuring instruments are connected in a circuit
2.2.1Voltmeter
2.2.2Ammeter
2.2.3
2.3Give FOUR examples of secondary cells. (4\ (8080641\ Copyright reserved Please turn over
2.4A step down transformer with a turn ratio of 10:1 is connected to a 250 V/50
2.4.1oltage across secondary winding
2.4.2
2.5Draw the IEC circuit symbols for each of the following:
2.5.1Iron core transformer
2.5.2Iron core inductor
2.5.3Polarised capacitor
2.5.4Rectifier diode (4 1\ (4\ [28]28
Q3— Section header —
3.1Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A D\ next to the question number (3.1.1
3.1.5\n the ANSWER BOOK.
3.1.1Germanium has valence electrons four two
3.1.2The value of potential difference across a cell is reading obtained when the circuit is open. slightly greater than the electromotive force.
3.1.3A capacitor blocks the flow of alternating current. blocks the flow of direct current. blocks both types of current. does not block direct current
3.1.4Holes are negative charge carriers. onl y found around the junction of P
3.1.5The junction voltage across a silicon diode 0,06 0,6
3.2Complete the following sentences by writing only the missing word or words next to the question number (3.2.1
3.2.5in the ANSWER BOOK.
3.2.1Magnetic lines of force move from to inside a bar magnet. (2\
3.2.2A bipolar transistor can be used as a .and as an (2\
3.2.3The anode of a diode is made from semiconductor material. (1\
3.2.4ener diode is normally used for (1\
3.2.5The insulating material between the plates of a capacitor is referred to as a (1\ (8080641\ Copyright reserved Please turn over
3.3Choose an item from COLUMN B that matches a description in COLUMN A. Write only the letter (A \next to the question number (3.3.1
3.3.5\in the ANSWER BOOK. COLUMN COLUMN
3.3.5Flow from negative to positive Stores electrical charge Allows current to flow in one direction only Provides larger currents Does not allow current to flow
3.4Indicate whether the following statements are TRUE or FALSE by writing only 'True' or 'F als e' next to the question number (3.4.1
3.4.5\in the ANSWER BOOK.
3.4.1A galvanometer can measure large currents.
3.4.2Intrinsic semiconductor material is obtained after the process of doping.
3.4.3Ohm s law gives the relationship between voltage, current and resistivity.
3.4.4Electrons are placed in orbits around the nucleus of an atom using the formula N = 2n
3.4.5
3.5Name the unit of measurement of each of the following quantities:
3.5.1Capacitance
3.5.2Battery capacity
3.5.3
Q4— Section header —
4.1hree resistors with the following values are connected in series with each other to a 32 V direct current power supply
4.1.1Total resistance of circuit (3\
4.1.2Current flow through the circuit (3\
4.1.3Current flow through R (1\
4.1.4Colour code of R (4\
4.2Define Lenz' s Law (3\
4.3List THREE factors that influence capacitance. (3\
4.4Draw the charging curve of a capacitor. (2\
4.5Draw the circuit symbol of a ener diode and indicate t he anode and cathode on the symbol. (2\ 21]
Mark Allocation
Total100 marks
Sections26 + 28 = 54 marks
Paper information
TitleDocument
SubjectIndustrial Electronics
LevelN1
Document typeQuestion paper
Year2021
MonthApril
Pages8
Downloads2
Examination context
Decade2020s
Years ago5y
SeasonAutumn (SH)
Start dayThursday
Exam periodApril 2021
Days since exam2,017
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.
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