Download VTU ((Visvesvaraya Technological University) B.E/B-Tech 2019 July ( Bachelor of Engineering) First & Second Semester (1st Semester & 2nd Semester) 2017 Jan 2016 Dec 15ELNI5 Basic Electronics Question Paper
Rc
f00-
1
2--
sC
/32 I
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Fig Q3(b)
1 of 2
Important Note
15ELNI5/25
First/Second Semester B.E. Degree Examination, Dec.2016/Jan.2017
Basic Electronics
Time: 3 hrs. Max. Marks: 80
Note: Answer FIVE full questions, choosing one full question from each module.
Module-1
1 a. Define the following diode parameters :
i) Knee voltage
ii) Maximum forward current
iii) Peak inverse voltage
iv) Reverse breakdown voltage
v) Maximum power rating.
b. With neat circuit diagram and waveform explain the working
c. Draw common emitter circuit. Sketch input and output
operating regions by indicating them on characteristic curve.
(05 Marks)
(06 Marks)
of Full wave Bridge Rectifier.
characteristics. Also explain
(05 Marks)
b. Derive the relationship between a and R. Also calculate the a value and
3
value of a
transistor if 1
0
= 10011A and l
c
= 2mA. (04 Marks)
c. With a neat diagram, explain the output characteristics of a transistor in common base
configuration. (07 Marks)
I. Module-2
41
What is DC load line? Explain with neat circuit the operation of voltage divider bias circuit.
1
(05 Marks)
What is op-amp? List the characteristics of an ideal op-amp. (06 Marks)
c. For the circuit shown in Fig Q3(c). compute
i) Three transistor currents
ii) Voltage drop across Rc and
RE1 ?
(05 Marks)
USN
2 a. Write a note on voltage regulator circuit. r ?\ (05 Marks)
OR
4
10.
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Rc
f00-
1
2--
sC
/32 I
"
Fig Q3(b)
1 of 2
Important Note
15ELNI5/25
First/Second Semester B.E. Degree Examination, Dec.2016/Jan.2017
Basic Electronics
Time: 3 hrs. Max. Marks: 80
Note: Answer FIVE full questions, choosing one full question from each module.
Module-1
1 a. Define the following diode parameters :
i) Knee voltage
ii) Maximum forward current
iii) Peak inverse voltage
iv) Reverse breakdown voltage
v) Maximum power rating.
b. With neat circuit diagram and waveform explain the working
c. Draw common emitter circuit. Sketch input and output
operating regions by indicating them on characteristic curve.
(05 Marks)
(06 Marks)
of Full wave Bridge Rectifier.
characteristics. Also explain
(05 Marks)
b. Derive the relationship between a and R. Also calculate the a value and
3
value of a
transistor if 1
0
= 10011A and l
c
= 2mA. (04 Marks)
c. With a neat diagram, explain the output characteristics of a transistor in common base
configuration. (07 Marks)
I. Module-2
41
What is DC load line? Explain with neat circuit the operation of voltage divider bias circuit.
1
(05 Marks)
What is op-amp? List the characteristics of an ideal op-amp. (06 Marks)
c. For the circuit shown in Fig Q3(c). compute
i) Three transistor currents
ii) Voltage drop across Rc and
RE1 ?
(05 Marks)
USN
2 a. Write a note on voltage regulator circuit. r ?\ (05 Marks)
OR
4
10.
15ELN15/25
OR
4 a. Explain how op-amp can be used as
i) An integrator ii) Differentiator iii) Voltage follower. (06 Marks)
b. With neat circuit diagram, explain base biased method with necessary equations. (05 Marks)
c. Find the output of the following op-amp circuit. (05 Marks)
Fig Q4(c)
Module-3
5 a. Convert (1101101)2 = )10 and (96)10 ? )2.
b. Convert (FA876)16 = )8 and (237)8 =
)16-
c. Design Full adder circuit.
OR
a. State and prove De Morgan's theorem.
.0044,
b. What are Universal gates? Realize AND, OR Gates usin niversal gates.
c. Subtract (19)10 from (15)
1
0 using ls and 2s compliment methods.
Module-4
7 a. Write a note on NOR gate latch.
b. Explain the working of clocked RS flip flop using NAND gates.
yo444
. Define microcontrollers. Write their important applications.
6..
1
(08 Marks)
(02 Marks)
(06 Marks)
Module-5
9 a. Explain the block diagram of communication system. (05 Marks)
b. Define Amplitude modulation. Derive mathematical expression for the same. Draw
waveforms.
(06 Marks)
c. Explain the construction and the principle of operation of LVDT. (05 Marks)
OR
10 a. List the differences between Amplitude modulation and frequency modulation.
(05 Marks)
b.
Explain frequency modulation with neat waveforms. (05 Marks)
c.
A carrier of 10V peak and frequency 1001(1-12 is amplitude modulated by a sine wave of 4V
peak and frequency 1000Hz. Determine the modulation index for the modulated wave and
draw the amplitude spectrum. (06 Marks)
* * * * *
(04 Marks)
O
t (04 Marks)
NO Marks)
(05 Marks)
(05 Marks)
(06 Marks)
(05 Marks)
(06 Marks)
(05 Marks)
OR
8 a. Explain the architecture of 8051 micro controller.
b. Mention the difference between latch and Flip flop.
c. Write a note on interfacing of 8051 microcontroller with stepper motor.
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This post was last modified on 01 January 2020