SeeIf you are a candidate seeking WAEC Electronics Questions and Answers 2023, you have arrived at the right place as we will break them down for you. We will go further to show you how WAEC Furniture Making questions are set and the best way to answer for full marks.
The West African Senior School Certificate Examination (WASSCE) is organized by WAEC in West African countries.
The exam boasts millions of candidates each year due to its importance and over 15 subjects are sat for in the exams including Electronics.
That being said, let’s go through the questions and answers for the subject at hand.
WAEC Electronics Questions and Answers 2022/2023
There will be three papers, Papers 1, 2, and 3, all of which must be taken. Papers 1 and 2 shall be a composite paper to be taken at one sitting.
PAPER 1: will consist of fifty multiple-choice objective questions all of which are to be answered in 1 hour for 50 marks.
PAPER 2: will consist of seven short-structured questions. Candidates will be required to answer any five in 1 hour for 50 marks.
PAPER 3: will be a practical paper of two experiments both of which are to be carried out by candidates in 3 hours for 100 marks.
Sample Questions Paper 1 – Objective
1. The decimal equivalent of the binary number 10002 is
2. Modulation is a process in which
A. radio signal travels between two transmitters.
B. telephone subscribers are connected to one other.
C. audio signals are carried over radio waves.
D. audio signals are amplified.
3. Which of the following electrical appliances operates on the principle of a closed-loop system?
A. Immersion heater
C. Electric fan
D. Electric kettle
Use figure 1 to answer Questions 4 and 5. C1 = 10 µF
C3 = 20 µF X Y
C2 = 10 µF
4. The total capacitance between X and Y is
A. 10.0 µF.
B. 20.0 µF.
C. 30.0 µF.
D. 40.0 µF.
5. The total capacitance when C3 is removed from the circuit is
A. 2.0 µF.
B. 5.0 µF.
C. 10.0 µF.
D. 20.0 µF.
Paper 2 – Essay
1. (a) (i) Draw the circuit diagram of a Colpitts oscillator
(ii) Label any three parts of the figure in 1a(i).
(b) Explain the working principle of a Colpitts oscillator.
2. (a) (i) With the aid of sketches, distinguish between dynamic and electrostatic transducers. (ii) State two advantages of electrostatic transducers over dynamic transducers.
(c) List two electromechanical transducers.
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Paper 3 – Practical
Apparatus one 12 V d.c. power supply; one 12 V, 1 A a.c. power supply; one d.c. voltmeter (0 – 12 V); one a.c. voltmeter (0 – 12 V); one d.c. ammeter (0 – 10 A); one a.c. milliammeter (0 – 100 mA); one-decade resistance box Rb (0 – 200 Ω); one 40 W choke; one single-pole switch; one set of hand tools; connecting wires.
1. AIM: To determine the resistance of a choke.
(a) Connect the circuit as shown in Fig. 1
(b) Ask the supervisor to check the circuit connection.
(c) Copy Table 1 into your answer booklet.
Table 1 Rb(Ω) I(A) VL(V) 0 10 20 30 40 50 60 70
(d) Close switch S.
(e) Read and record in Table 1 the readings on the ammeter A and voltmeter VL.
(f) Open switch S.
(g) Increase the resistance value of Rb in steps of 10 Ω.
(h) Repeat steps (d) to (g) for up to 70 Ω as shown in Table 1.
(i) Plot a graph of voltage VL (V) on the vertical axis against the current I (A) on the horizontal axis.
(j) Determine the gradient of the graph.
DISCLAIMER! These are not real WAEC GCE Electronics questions but likely repeated questions over the years to help candidates understand the nature of their examinations. Ensure to take note of every question provided on this page.
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