Industrial Electronics N1 — Document
August 2018 — N1 — Industrial Electronics
N1
2018
Nated Engineering
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Q1— Section header —
1.1Various 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 (1.1.1
1.1.10\in the ANSWE R BOOK.
1.1.1he P type material is connected to the positive supply and the
1.1.2galvanometer ampere meter clamp meter volt meter
1.1.3ONE disadvantag e of an analogue meter is that the ohms scale is linear. the display is easy to read.
1.1.4six valence electrons. eight valence elec trons. no valence electrons. four valence electrons.
1.1.5is an element that allows current to flow because it has many free electrons is an element that has an abundance of neutrons. allows current to flow because it f
1.1.6The colour code for a 6 blue black black silver. blue brown black silver. blue black gold gold. blue b
1.1.7a good conductor a bad insulator neither a good conductor nor a good insulator in its pure state.
1.1.80,6 volt 0,06 volts 0,3 volts 0,03 volts
1.1.9two junctions. three junctions. one barrier layer. no junctions.
1.1.10temperature. number of turns. dielectr ic constant. current.
1.2THREE resistors with the following values are connected in parallel to a 50 volt DC supply: Calculate the following values:
1.2.1The total resistance of the circuit (4\
1.2.2The total current flow through the circuit (3\
1.2.3The voltage drop across the 15 (1\
1.2.4The power consumed by the 30 (3\
1.3Give the colour code of a 20 (4\ [25] 808064125
Q2— Section header —
2.1A copper conductor has a length of 50 metres and a diameter of 6 mm. Determine the resistance of this conductor if it has a resistivity of m. (8\
2.2
2.3THREE cells, each with an EMF of 1,5 volts and an internal resistance of are connected to each othe r in series. This battery is then connected across a 15 Calculate the following:
2.3.1he t otal EMF of the battery (2\
2.3.2he t otal internal resistance of the battery (2\
2.3.3The total resistance of the circuit (3\
2.3.4The current drawn by the circuit (4\
2.3.5The voltage drop across the 15 (3\ [25]25
Q3— Section header —
3.1Choose the correct word or words from those given in brackets. Write only the word or words next to the question number (3.1.1
3.1.10\in the ANSWER BOOK.
3.1.1Transformers operate on the principle of (self induction/magnetic induction/mutual induction\
3.1.2Polarisation is the formation of (hydrogen bubbles/oxygen bubbles\ around the carbon rod of a cell.
3.1Zener diode can conduct in ( one direction /two directions
3.1.4A horse shoe magnet has ( two/four \oles.
3.1.5type semiconductor material is (intrinsic/extrinsic\.
3.1.6A capacitor blocks the flow of (direct/alternating\ent.
3.1.7A peak to peak value is ( one/two/four \times the amplitude of a sine wave.
3.1.8Magnetic lines of force move from (north/south\ a magnet. 8080641 750
3.1.9The term EMF is used when referring to an (open/closed\rcuit.
3.1.10
3.2
3.2.1he total capacitance of the circuit
3.2.2
3.3A transformer has a turns ratio of 20:1. When it is connected to the mains supply of 240 volts, a current of 1,25 amperes flows through the primary winding. Determine the following
3.3.1The current flow through the secondary windings
3.3.2
3.4Give THREE advantages of secondary cells. (3\ [25]25
Q4— Section header —
4.1Indicate whether the f ollowing statements are TRUE or FALSE. Choose the answer and write only ' rue' or ' alse' next to the question number (4.1.1
4.1.5\ the ANSWER BOOK.
4.1.1Electrons are positively charged particles.
4.1.2Like poles of a magnet ar e attracted to each other.
4.1.3The number of turns of copper wire influences the strength of an electromagnet.
4.1.4The crystal lattice structure of germanium is similar to that of silicon.
4.1.5
4.2Choose an item from COLUMN B that matches a description in COLUMN A. Write only the letter (A O\next to the question number (4.2.1
4.2.10\in the ANSWER BOOK. COLUMN A COLUMN B
4.2.10An atom that has four valence electrons The time required to complete one cycle of a sine wave form Majority charge carriers of N type materials Used to measure curr
4.3Define the following terms:
4.3.1Lenz's law (4\
4.3.2Forward bias (3\ .3.3 Doping (3\ [25] TOTAL: 10025
Mark Allocation
Total100 marks
Sections25 + 25 + 25 + 25 = 100 marks
Paper information
TitleDocument
SubjectIndustrial Electronics
LevelN1
Document typeQuestion paper
Year2018
MonthAugust
Pages8
Downloads3
Examination context
Decade2010s
Years ago8y
SeasonWinter (SH)
Start dayWednesday
Exam periodAugust 2018
Days since exam2,992
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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