SEMESTER
:
SEMESTER 2 2021/2022
PROGRAMMES
:
MODULE NAME
:
PRINCIPLE OF ELECTRONICS
MODULE CODE
:
BELT3012
ASSESSMENT
:
TEST
..........................................................................................................................................................................................
Name
ID Number
Program/Group
Lecturer’s Name
Section
Question
Module
Outcome
Q1-Q6
CLO1
Q7-Q10
CLO2
Q1
CLO1
Q2
CLO2
Marks
Section A
Section B
TOTAL
1. This question paper consists of FIVE (5) printed pages including the cover
page.
2. Answer all questions in this exam script.
DO NOT OPEN THE PAGE UNTIL INSTRUCTED
Page 1 of 5
CONFIDENTIAL
BELT3012
SECTION A (10 marks)
Answer all questions.
[Q1-Q6 : CLO1]
1. Figure 1 below is a symbol of electronic device. Name this device.
Figure 1
A.
B.
C.
D.
Capacitor
Photodiode
Zener Diode
Light Emitting Diode (LED
2. The approximate forward voltage drop for a Zener diode is_________
A. 7.0 volt.
B. 0.3 volt.
C. 0.7 volt.
D. 1.7 volt.
3. The semiconductor component that is commonly used as a voltage regulator is
called_________.
A. Thermistor
B. Transistor
C. Rectifier
D. Zener Diode
4. Which of the following is made of semiconductor material?
A. LED
B. Transistor
C. Thermistor
D. All above
5. Which the following is a basic function of a Transistor.
A. Act an electronic switch.
B. Act as amplifier.
C. Act as digital switch.
D. All of above.
PRINCIPLE OF ELECTRONICS
Page 2 of 5
CONFIDENTIAL
BELT3012
6. Which electronic device below can be used as an amplifier?
A. Diode
B. Capacitor
C. Transistor
D. Transformer
7. An electronic device which allows the flow of electrical current in two way direction,
is called____.
A. Zener Diode
B. Diode
C. LED
D. Photodiode
8. The voltage drop across base-emitter junction of p-n-p silicon transistor in normal
operation is about____.
A. 700 V
B. 0.2 V
C. 17 mV
D. 700 mV
9. Figure 2 below is a symbol of electronic device, called_____.
Figure 2
A.
B.
C.
D.
NPN Transistor
PNP Transistor
MOSFET Transistor
Rectifier
10. Name the electronic device in figure 3.
Figure 3
A.
B.
C.
D.
Fix Resistor
Potentiometer
Variable capacitance
Rectifier
PRINCIPLE OF ELECTRONICS
Page 3 of 5
CONFIDENTIAL
BELT3012
SECTION B (30 marks)
Answer all questions.
1. a) What is the main function of a Capacitor?
[2 marks]
b) Draw formation of four diodes to become a rectifier.
[2 marks]
c) Explain the function of a Zener Diode.
[2 marks]
d) What is the main function of a Transistor?
[3 marks]
e) Draw a circuit diagram using NPN Transistor as an electronic switch and explain the
operation the circuit.
[6 marks]
PRINCIPLE OF ELECTRONICS
Page 4 of 5
CONFIDENTIAL
BELT3012
+ 30 V
IC
RB = 700Ω
VRB
VRC
RC = 20Ω
C
IB
B
E
VRE
RE
IE
E
Figure 1
2. Figure 1 shows a small signal amplifier using NPN Transistor as a main device.
Given β=30 and current IB = 5mA. In application of Kirchhoff’s Law, calculate;
a) Current IC and IE.
[3 marks]
b) Value of voltage base-emitter VBE and resistor’s voltage VRB.
[3 marks]
c) Value of resistor’s voltage VRC.
[3 marks]
d) Value of resistor’s voltage VRE and resistance’s resistor RE.
[4 marks]
e) Value of voltage collector-emitter VCE.
[2 marks]
END OF QUESTION PAPER
PRINCIPLE OF ELECTRONICS
Page 5 of 5