DBE NSC/SC Electrical Technology Exam Papers May/June 2023 : education.gov.za

Organisation : Department of Basic Education (DBE)
Exam Name : National Senior Certificate (NSC) / Senior Certificate (SC) Examinations
Facility : Download Exam Papers
Month &Year : May/June 2023
Subject : Electrical Technology
Medium : English
Papers : Digital Electronics, Electronics and Power Systems Papers
Country : South Africa
Website : https://www.education.gov.za/Curriculum/NationalSeniorCertificate(NSC)Examinations/2023MayJuneExamPapers.aspx

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DBE NSC/SC Electrical Technology Exam Paper

Download Department of Basic Education (DBE) National Senior Certificate (NSC) / Senior Certificate (SC) Examinations May/June 2023 Electrical Technology (Digital Electronics, Electronics and Power Systems) Papers

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Question 1: Multiple-Choice Questions
Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question numbers (1.1 to 1.15) in the ANSWER BOOK, e.g. 1.16 D.

1.1 A critical incident causes …
A. damage to equipment. External repair services are required.
B. a person to sustain a sudden and severe physical injury. External medical services are required.
C. a person to sustain a physical injury. External medical services are not required.
D. a person to get a mental disturbance. A restful recovery is required.

1.2 The operation of a Schmitt trigger can best be described by …
A. hysteresis.
B. negative feedback.
C. open-loop gain.
D. attenuation.

1.3 The … is the only op-amp application that uses an ‘open loop’ connection to bring its full gain of ±100 000 into use.
A. summing amplifier
B. integrator
C. comparator
D. differentiator

1.4 The … determines the shape of the output in an op-amp integrator circuit.
A. input capacitor
B. feedback resistor
C. input voltage
D. RC time constant

1.5 When a square wave is fed to the input of a passive RC differentiator with a short time constant, the output will be a …
A. sine wave with 90º phase shift.
B. spike with a fast rise and slow decay.
C. square wave with 180º phase shift.
D. a triangular wave.

1.6 ONE of the characteristics of an ideal op amp is that the input impedance is …
A. extremely high.
B. zero.
C. extremely low.
D. moderate.

1.7 When negative feedback is used in an op-amp circuit, the overall gain is …
A. increased.
B. unchanged.
C. reduced.
D. infinite.

1.8 When the anodes of all eight LEDs are connected together to a single positive voltage rail, it is called a common ….
A. cathode.
B. anode.
C. display.
D. neutral.

1.9 A combinational logic circuit which combines an AND gate with an exclusive OR gate is called a …
A. full adder.
B. parallel adder.
C. half adder.
D. binary adder.

1.10 A clocked RS flip-flop is in a reset condition when …
A. S = 1, R = 1
B. S = 1, R = 0
C. S = 0, R = 1
D. S = 0, R = 0 (1)

1.11 The process where the timing signal is delayed by a fraction through each flip-flop is known as …
A. transmission delay.
B. propagation delay.
C. queuing delay.
D. processing delay.

1.12 A register where all four bits of data are introduced to the register at the same time but, once stored, they are shifted out of the register one bit at a time is called …
A. parallel-in: parallel-out.
B. series-in: series-out.
C. parallel-in: series-out.
D. series-in: parallel-out.

1.13 The term ROM means … with reference to microcontrollers.
A. read-only memory
B. read-output memory
C. read-onset memory
D. random only memory

1.14 The term ‘SPI’ stands for …
A. serial peripheral interface.
B. standard parallel interface.
C. serial pathway interface.
D. standard processor interface.

1.15 The process that allows a task to be repeated multiple times is called ….
A. debugging.
B. data flow lines.
C. looping.
D. a flow diagram