Shivaji University Entrance Exam 2020 Question Paper MSc. Electronics

Shivaji University , Kolhapur
Seat Paper Code(ENT202011)
No.
M.Sc Entrance Exam , MAY-2020

58298-Electronics

Day And Date : Thursday 19/11/2020 Total Marks : 100
Time : 15:30 To 17:00
Marks
1 The resistance of a conductor depends on _____________. 1
A) length of a conductor
B) cross-section area of the conductor
C) nature of the material
D) All the above
2 Which of the following is universal gate ? 1
A) AND
B) NAND
C) OR
D) EX-OR
3 Alkaline solution have a pH value ……………. than 7 1
A) greater
B) less
C) equal
D) none of these
4 ADC 0804 is ------- bit converter. 1
A) 4
B) 8
C) 16
D) 10
5 The forward breakover voltage of SCR is decreased by increasing……………. 1
A) anode voltage
B) anode current
C) gate current
D) none of these
6 In ADC 0804, if VRef/2 pin is left open then analog input voltage span is ----volt. 1
A) 0 – 1
B) 0 – 2
C) 0 – 4
D) 0 – 5
7 1

8 The 2's complement of 1101100 is _________ 1
A) 0010011
B) 0010010
C) 0010100
D) 0010110
9 asd 1
A) a
B) b
C) c
D) d
10 Common cathod type display requires an active -------------- configuration for code 1
converter circuit.
A) High
B) Low
C) Both high and low
11 An ideal instrumentation amplifier has --------------- common mode gain, 1
A) Zero
B) Infinite
C) 1000
12 ------------------ display are characterized by low power dissipation, low cost, large 1
area and low operating speed.
A) LED
B) CRT
C) LCD
D) All of the above
13 The relation between magnetising force (H) and magnetic flux density (B) is 1
described by ________________.
A) B = μH
B) B = H/μo μr
C) B = μoH/ μr
D) B = μrH/ μo
14 ---------------- is a nonlinear process used in the signal conditioning equipment. 1
A) Modulation
B) Amplification
C) Attenuation
D) Integration
15 LVDT IS ------------------ transducer. 1
A) Velocity
B) Flow
C) Displacement
D) Photo
16 The photo conductive material of photo conductive cell is -------------------. 1
A) quartz
B) iron
C) metal oxides
D) cadmium sulphide

17 A known accurate measure of physical quantity is termed as a --------------. 1
A) standard
B) accuracy
C) error
D) precision
18 Input offset voltage in op-amp results due to --------------- 1
A) Identical I / P transistor
B) Non-identical I / P transistor
C) Power supply
19 1

20 1

21 The half adder adds -------bits. 1
A) 2
B) 3
C) 4
D) 8
22 The IC 7490 is a …… 1
A) D flip Flop
B) T Flip Flop
C) Decade Counter
D) Both a & b
23 Binary ripple counter with 4 flip-Flops counts ……… states. 1
A) 16
B) 8
C) 4
D) 2
24 A zener diode __________. 1
A) is a battery
B) has a constant voltage in the brakdown region
C) has a barrier potential of 1 V
D) is forward biased
25 ----- is a memory pointer register. 1
A) ACC
B) Flag
C) PC
D) IR
26 The instruction MVI C, 25 H has -------- addressing mode. 1
A) direct
B) Register
C) Indirect
D) Immediate

27 Astable multivibrator has --------------- stable states. 1
A) One
B) Two
C) No
28 1

29 1

30 -------- mode is called as auto reload mode 1
A) Mode 0
B) Mode 1
C) Mode 2
D) Mode 3
31 The decade counter is also called as …….. Counter. 1
A) Mod-5
B) Mod-7
C) Mod-10
D) Mod-12
32 What is the function of a buffer circuit? 1
A) to provide an output that is inverted from that on the input
B) to provide an output that is equal to its input
C) to clean up the input
D) to clean up the output
33 RC- integrator circuit behaves as ------- 1
A) Low pass filter
B) High pass filter
C) Band pass filter
D) Band stop filter
34 The time required by the voltage from its initial value to reach its maximum value 1
is known as ----------- time.
A) Fly back
B) Sweep
C) Lagging
35 In an npn transistor, the majority carriers in the emitter are __________. 1
A) free electrons
B) holes
C) Both A and B
D) None of the above

36 Memory IC 27128 is of ---------byte 1
A) 2K
B) 4K
C) 8 K
D) 16 K
37 1

38 An integrated circuit offers……………… 1
A) Improved performance
B) High speed
C) Low powers consumption
D) All the A, B & C
39 Supply Voltage Rejection Ratio (SVRR) of op-amp is the measure of………… 1
A) voltage gain
B) I/P impedance
C) noise
D) o/p impedance
40 The output voltage of a phase detector in PLL is a dc voltage and is often 1
referred to as the ------------voltage
A) actual
B) error
C) measured
D) both A & B
41 Modulation is done at . . . . . . . . . 1
A) Transmitter
B) Receiver
C) both receiver & transmitter
D) none of these
42 Which parameters are used to indicate the speed of a comparator? 1
A) Response Time
B) Propagation Delay
C) Both a and b
D) None of the above
43 What is the feedback factor of voltage follower circuit? 1
A) Zero
B) Unity
C) Infinity
D) Between zero & one
44 IC MAX232 is used _____. 1
A) To convert the RS232’s signals to TTL voltage levels.
B) to match baud rate of IBM PC and RS232
C) for handshaking process between PC and 8051
D) none of these

45 The conductivity ---------- is a process where holes and electrons both are injected 1
into the drift layer
A) modulation
B) demodulation
C) amplification
D) rectification
46 Mode 1 is ------- bit Timer mode. 1
A) 8
B) 16
C) 32
D) 11
47 According to DeMorgan theorem (x + y)' = _________. 1
A) (x y)'
B) x' + y'
C) x' y'
D) x y
48 The operation of log and antilog amplifiers is based on the -------- 1
characteristics of a p-n junction.
A) Non-linear
B) Linear
C) Linear and Non-Linear
49 The Q-factor of a narrow band pass filter is ------- 1
A) Zero
B) Greater than one
C) Less than one
D) Its bandwidth
50 The lowest gain that can be obtained from a Non-inverting amplifier is ------- 1
A) 0.5
B) 1
C) Zero
D) 10
51 For an ideal op-Amp has ---------- input impedance 1
A) 75 ohm
B) 0 ohm
C) 2 Mega ohm
D) Infinite ohm
52 The only drawback of Op-amp is ---------- 1
A) low output impedance
B) High input impedance
C) Fall of gain at low frequencies
D) Fall of gain at high frequencies

53 1

54 Which of the following gate is used as a controlled invertor ? 1
A) AND
B) NAND
C) OR
D) EX-OR
55 The full adder adds -------bits. 1
A) 2
B) 3
C) 4
D) 8
56 Shift registers are used for___ 1
A) shifting
B) rotating
C) adding
D) both a and b
57 Mode 2 operation of IC 8253 is --------- 1
A) Square wave Generator
B) Software triggered strobe
C) Hardware retriggered one shot
D) Rate generator
58 The instruction STA, 6020 H has -------- addressing mode. 1
A) direct
B) Register
C) Indirect
D) Immediate
59 Parallel resonant circuit is also called as ----------. 1
A) Acceptor
B) Rejecter
C) Filter
D) Rectifier
60 Timer overflow is indicate by ------- flag 1
A) IE
B) TF
C) TR
D) TMOD
61 The precision rectifier circuit is designed to--------------- 1
A) rectify waveforms with very large voltage swings
B) rectify waveforms with very small voltage swings
C) rectify precision waveforms
D) amplify and rectify waveform

62 In 8051 baud rate is set using -------. 1
A) Timer 1 in mode 2
B) Timer 1 in mode 1
C) Timer 1 in mode 0
D) Timer 1 in mode 3
63 The meaning of sbit LED=P2^7 is---------- 1
A) P2 is EXORed with LED
B) P2.7 bit is XORed with LED
C) P2.7 bit is labeled as LED
64 Reverse recovery current in power diode depends upon…………. 1
A) temperature
B) storage charge
C) forward current
D) PIV
65 ………………… is a unidirectional device. 1
A) Triac
B) Diac
C) SCR
66 In two position control two different set point are used and the gap between these 1
set points is called -------------
A) Hysteresis
B) neutral zone
C) interset point gap
D) error
67 ----------------- communication protocol used in automation systems 1
A) RS 232
B) IEEE 801.1
C) RS 485
D) RS 486
68 Interrupt priority can be changed using -----------register. 1
A) IE
B) IP
C) TCON
D) TMOD
69 ---------------- switches are not accessible for the operator 1
A) SPDT
B) Limit
C) Push button
D) Rotary
70 Which of the following cannot be an input that is given to the PLC 1
A) Manual Switches
B) Relays
C) Sensors

71 The hybrid in telephone system is a ____. 1
A) relay
B) transistor
C) special transformer
D) MOSFET
72 1

73 The value of the inductive reactance depends on ………… 1
A) a) voltage
B) b) current
C) c) frequency
D) d) power
74 Flip flops are ----------------circuits. 1
A) Sequential
B) Combinational
C) Both a & b
D) None of These
75 ------ signal is used to demultiplex AD0-AD7. 1
A) RESET IN
B) ALE
C) RD
D) IO/M
76 LM317 IC can operate as a……………… 1
A) modulator
B) amplifier
C) inductor regulator
D) floating regulator
77 Thevenin theorem helps to replace given network by __________ . 1
A) a single voltage source with a series resistance
B) a single current source with a series resistance
C) a single voltage source with a parallel resistance
D) None of the above
78 Half Adder can be implemented with ______________ gates. 1
A) XOR and AND
B) XOR and NOT
C) XOR and OR
D) NOR and AND
79 1

80 If line frequency is 60 Hz, the output frequency of a bridge rectifier is ______. 1
A) 30 Hz
B) 60 Hz
C) 120 Hz
D) 240 Hz
81 An emitter follower has a voltage gain that is ____________. 1
A) much less than one
B) approximately equal to one
C) greater than one
D) zero
82 Possible I/O lines for IC 8255 ------- 1
A) 3
B) 4
C) 8
D) 24
83 To interface EPROM IC 27128 with 8085, the minimum ------address lines are 1
required.
A) 11
B) 12
C) 13
D) 14
84 -------- is called as ‘auto reload’ mode in 8051 Timer operation. 1
A) Mode 0
B) Mode 1
C) Mode 2
D) Mode 3
85 To interface EPROM IC 2764 with 8085, the minimum --------address lines are 1
required.
A) 11
B) 12
C) 13
D) 14
86 The differential amplifier can be biased by using ---------------- 1
A) emitter bias
B) current mirror bias
C) constant current bias
D) all of these
87 An integrated circuit offers ----------- 1
A) low power consumption
B) improved performance
C) high speed
D) All of these
88 As temperature increases the Slew rate of an Op-Amp. ------ 1
A) Gradually decreases
B) Gradually increases
C) Remains constant

89 Which of the following is not an input or output of the 555 timer 1
A) Reset
B) Threshold
C) Control voltage
D) Clock
90 1

91 If the control voltage to a VCO increases, the output frequency --------- 1
A) Decreases
B) Does not changes
C) Increases
92 Butterworth active filter has -------- 1
A) Ripple pass and Stop band
B) Flat pass and Stop band
C) Ripple pass and Flat Stop band
D) Flat pass and Ripple Stop band
93 1

94 1

95 1

96 1

97 1

98 1

99 1

100 1