ELECTRONICS ENGINEERING- PAGE 2
ELECTRONICS ENGINEERING- PAGE 2 MCQs
1. What is the maximum power rating for light emitting diodes ?
(A) 150 mW (B) 300 mW (C) 500 mW (D) 5 mW
Ans: A
2. A Transistor is a ______ operated device.
(A) Voltage (B) Current (C) Both Voltage and Current (D) None of the above
Ans: B
3. The Operation of JFET involves
(A) Flow of minority Carriers (B) Flow of majority Carriers (C) Recombination (D) None of the above
Ans: B
4. When transistors are used in digital circuits they usually operate in the :
(A) Active Region (B) Saturation and Cutoff Regions (C) Breakdown Region (D) Linear Region
Ans: B
5. If a 2 mV signal produces a 2V output, what is the Voltage Gain ?
(A) 0.001 (B) 100 (C) 1000 (D) 0.004
Ans: C
6. Least Distortion in the Output of a Power amplifier occurs in
(A) Class A (B) Class B (C) Class AB (D) Class C
Ans: A
7. In a Class C Amplifier
(A) Efficiency and distortion both are maximum. (B) Efficiency and distortion both are minimum.
(C) Efficiency maximum but distortion minimum. (D) Efficiency minimum but distortion maximum.
Ans: A
8. The Cut in Voltage of a Germanium junction diode is
(A) 0.1V (B) 0.3V (C) 0.7V (D) 1V
Ans: B
9. Which among the following does not belong to the category of LC oscillator ?
(A) Hartley oscillator (B) Colpitt’s oscillator (C) Wein bridge oscillator (D) Clapp oscillator
Ans: C
10. Why is the practical value of | Aβ | considered to be slightly greater than one in oscillators ?
(A) To compensate for non-linearities existing in the circuit.
(B) To compensate for phase shifting of two relevant signals upto 180°.
(C) To compensate for the change in feedback voltage.
(D) To compensate for noise voltage.
Ans: A
11. The RC network of a Wien Bridge Oscillator consists of R1=R2=10 KΩ and C1=C2=1000nF. The frequency of oscillation is :
(A) 15.9 Hz (B) 159.12 Hz (C) 180 Hz (D) 15915 Hz
Ans: A
12. Which of the following oscillator will give most stable output oscillation frequency ?
(A) Colpitts oscillator (B) Hartley oscillator (C) Crystal oscillator (D) RC phase shift oscillator
Ans: C
13. Which Number System has a base of 16 ?
(A) Hexadecimal (B) Octal (C) Decimal (D) Binary
Ans: A
14. Which of these sets of Logic Gates are designated as Universal Gates ?
(A) NOR, NAND, XNOR (B) NOR, NAND, AND (C) OR, NOT, AND (D) NOR, NAND
Ans: D
15. In a 1 to 4 De multiplexer, how many select inputs lines are required ?
(A) 2 (B) 3 (C) 4 (D) 5
Ans: A
16. The Gray code representation of 15 is
(A) 1001 (B) 1000 (C) 1100 (D) None of the above
Ans: B
17. Which of the following expressions is in the Sum-Of-Products (SOP) form ?
(A) (A + B)(C + D) (B) (A)B(CD) (C) AB + CD (D) All
Ans: C
18. The Terminal count of a modulus-10 binary counter is
(A) 1010 (B) 1001 (C) 1000 (D) 1011
Ans: B
19. A simple Flip-Flop is
(A) 1 Bit Memory (B) 2 Bit Memory (C) 3 Bit Memory (D) None of the above
Ans: A
20. Which of the following is not a weighted code ?
(A) BCD (B) EXCESS-3 CODE (C) 8421 (D) 6421
Ans: B
21. A Karnaugh map (K-map) with 4 Variables has ________ cells.
(A) 2 (B) 8 (C) 16 (D) 32
Ans: C
22. A counter is a :
(A) Sequential Circuit (B) Combinational Circuit (C) Both Combinational and Sequential Circuit (D) None of the above
Ans: A
23. Which one of the following Logic Family IC is fastest ?
(A) TTL (B) ECL
(C) DTL (D) CMOS
Ans: B
24. In D flip-flop, ____ after the propagation delay.
(A) Input Follows Input (B) Output Follows Output
(C) Output Follows Input (D) Input Follows Output
Ans: C
25. The Op-Amp can Amplify
(A) A.C. Signals only (B) D.C. Signals only
(C) Both A.C. and D.C. Signals (D) Neither D.C. nor A.C. Signals
Ans: C
26. The Ideal Op-Amp has the following characteristics :
(A) RI=∞ A=∞R0=0 (B) RI=0, A=∞ R0=0
(C) RI=∞ A=∞ R0=∞(D) RI=0, A=∞ R0=∞
Ans: A
(A) 150 mW (B) 300 mW (C) 500 mW (D) 5 mW
Ans: A
2. A Transistor is a ______ operated device.
(A) Voltage (B) Current (C) Both Voltage and Current (D) None of the above
Ans: B
3. The Operation of JFET involves
(A) Flow of minority Carriers (B) Flow of majority Carriers (C) Recombination (D) None of the above
Ans: B
4. When transistors are used in digital circuits they usually operate in the :
(A) Active Region (B) Saturation and Cutoff Regions (C) Breakdown Region (D) Linear Region
Ans: B
5. If a 2 mV signal produces a 2V output, what is the Voltage Gain ?
(A) 0.001 (B) 100 (C) 1000 (D) 0.004
Ans: C
6. Least Distortion in the Output of a Power amplifier occurs in
(A) Class A (B) Class B (C) Class AB (D) Class C
Ans: A
7. In a Class C Amplifier
(A) Efficiency and distortion both are maximum. (B) Efficiency and distortion both are minimum.
(C) Efficiency maximum but distortion minimum. (D) Efficiency minimum but distortion maximum.
Ans: A
8. The Cut in Voltage of a Germanium junction diode is
(A) 0.1V (B) 0.3V (C) 0.7V (D) 1V
Ans: B
9. Which among the following does not belong to the category of LC oscillator ?
(A) Hartley oscillator (B) Colpitt’s oscillator (C) Wein bridge oscillator (D) Clapp oscillator
Ans: C
10. Why is the practical value of | Aβ | considered to be slightly greater than one in oscillators ?
(A) To compensate for non-linearities existing in the circuit.
(B) To compensate for phase shifting of two relevant signals upto 180°.
(C) To compensate for the change in feedback voltage.
(D) To compensate for noise voltage.
Ans: A
11. The RC network of a Wien Bridge Oscillator consists of R1=R2=10 KΩ and C1=C2=1000nF. The frequency of oscillation is :
(A) 15.9 Hz (B) 159.12 Hz (C) 180 Hz (D) 15915 Hz
Ans: A
12. Which of the following oscillator will give most stable output oscillation frequency ?
(A) Colpitts oscillator (B) Hartley oscillator (C) Crystal oscillator (D) RC phase shift oscillator
Ans: C
13. Which Number System has a base of 16 ?
(A) Hexadecimal (B) Octal (C) Decimal (D) Binary
Ans: A
14. Which of these sets of Logic Gates are designated as Universal Gates ?
(A) NOR, NAND, XNOR (B) NOR, NAND, AND (C) OR, NOT, AND (D) NOR, NAND
Ans: D
15. In a 1 to 4 De multiplexer, how many select inputs lines are required ?
(A) 2 (B) 3 (C) 4 (D) 5
Ans: A
16. The Gray code representation of 15 is
(A) 1001 (B) 1000 (C) 1100 (D) None of the above
Ans: B
17. Which of the following expressions is in the Sum-Of-Products (SOP) form ?
(A) (A + B)(C + D) (B) (A)B(CD) (C) AB + CD (D) All
Ans: C
18. The Terminal count of a modulus-10 binary counter is
(A) 1010 (B) 1001 (C) 1000 (D) 1011
Ans: B
19. A simple Flip-Flop is
(A) 1 Bit Memory (B) 2 Bit Memory (C) 3 Bit Memory (D) None of the above
Ans: A
20. Which of the following is not a weighted code ?
(A) BCD (B) EXCESS-3 CODE (C) 8421 (D) 6421
Ans: B
21. A Karnaugh map (K-map) with 4 Variables has ________ cells.
(A) 2 (B) 8 (C) 16 (D) 32
Ans: C
22. A counter is a :
(A) Sequential Circuit (B) Combinational Circuit (C) Both Combinational and Sequential Circuit (D) None of the above
Ans: A
23. Which one of the following Logic Family IC is fastest ?
(A) TTL (B) ECL
(C) DTL (D) CMOS
Ans: B
24. In D flip-flop, ____ after the propagation delay.
(A) Input Follows Input (B) Output Follows Output
(C) Output Follows Input (D) Input Follows Output
Ans: C
25. The Op-Amp can Amplify
(A) A.C. Signals only (B) D.C. Signals only
(C) Both A.C. and D.C. Signals (D) Neither D.C. nor A.C. Signals
Ans: C
26. The Ideal Op-Amp has the following characteristics :
(A) RI=∞ A=∞R0=0 (B) RI=0, A=∞ R0=0
(C) RI=∞ A=∞ R0=∞(D) RI=0, A=∞ R0=∞
Ans: A
27:-The instrument used to display a signal in frequency domain is
A:-CRO
B:-Wave Analyser
C:-Spectrum Analyser
D:-DSO
Ans: C
28:-IC 7447 is
A:-Encoder IC
B:-Comparator IC
C:-Multiplexer IC
D:-Decoder IC
Ans: D
29:-The element used to separate transmitting and receiving signals in a single antenna system
A:-Detector
B:-Mixer
C:-Low Noise Amplifier
D:-Duplexer
Ans: D
30:-Which one is not an internal part of PLC?
A:-CPU
B:-Timer
C:-Communication interface
D:-DIMM
Ans: D
31:-In an SCR Holding current is
A:-Equal to latching current
B:-Less than Latching current
C:-Greater than Latching current
D:-Zero
Ans: B
32:-The synchronous speed of a synchronous motor is directly proportional to
A:-Number of poles
B:-Applied voltage
C:-Frequency of input voltage
D:-None of these
Ans: C
33:-Bandwidth of an FM radio station
A:-250 KHz
B:-175 KHz
C:-200 KHz
D:-10.5 KHz
Ans: C
34:-Number of Flip Flips required to construct a MOD-12 counter
A:-12
B:-6
C:-4
D:-3
Ans: C
35:-The IC 8279 is
A:-DMA controller
B:-PPI
C:-Interrupt controller
D:-Keyboard and Display Interface
Ans: D
36:-Which logic family has the lowest propagation delay?
A:-Standard TTL
B:-RTL
C:-HTL
D:-Schottky TTL
Ans: D
37:-Anti-fuse is related to
A:-SCR
B:-SRAM
C:-ASIC
D:-MOSFET
Ans: C
38:- is not a microprocessor.
A:-8088
B:-8086
C:-Z80
D:-8051
Ans: D
39:-What is the total power of an AM signal with 100 Watts carrier power and 100% depth of modulation?
A:-100 watts
B:-100 K watts
C:-150 watts
D:-150 K watts
Ans: C
40:-Foster-Seeley demodulator is
A:-AM Demodulator
B:-FM Demodulator
C:-PAM Demodulator
D:-PPM Demodulator
Ans: B
41:-SCR in reverse blocking mode, the junctions are reverse biased are
A:-J1 alone
B:-J2 and J3
C:-J2 Alone
D:-J1 and J3
Ans: D
42:-Snubber circuits are used in SCR circuit for
A:-To limit current
B:-To protect from high dv/dt
C:-Protect from over temperature
D:-None of these
Ans: B
43:-Which oscillator that can be fabricated in IC form?
A:-Relaxation Oscillator
B:-Crystal Oscillator
C:-RC Phase Shift Oscillator
D:-Wein Bridge Oscillator
Ans: A
44:-Base of a number system is also called
A:-Count
B:-Radix
C:-Value
D:-Nibble
Ans: B
45:-Divide by error interrupt in 8086 can initiated using
A:-RST 0
B:-by Resetting
C:-Using INTR
D:-INT 0
Ans: D
46:-Using three numbers of resistances number of combinations can be made.
A:-3
B:-4
C:-5
D:-2
Ans: B
47:-The ideal output resistance of a voltage amplifier is resistance.
A:-Unity
B:-Infinity
C:-1000
D:-Zero
Ans: D
48:-CMRR is related to
A:-Inverter
B:-Chopper
C:-Amplifier
D:-Op-Amp
Ans: D
49:-Capacity of a single layer Blu-Ray disc
A:-5.5 GB
B:-11 GB
C:-25 GB
D:-50 GB
Ans: C
50:-Nyquist sampling theorem is related to
A:-BPSK
B:-PPM
C:-PCM
D:-FDM
Ans: C
A:-CRO
B:-Wave Analyser
C:-Spectrum Analyser
D:-DSO
Ans: C
28:-IC 7447 is
A:-Encoder IC
B:-Comparator IC
C:-Multiplexer IC
D:-Decoder IC
Ans: D
29:-The element used to separate transmitting and receiving signals in a single antenna system
A:-Detector
B:-Mixer
C:-Low Noise Amplifier
D:-Duplexer
Ans: D
30:-Which one is not an internal part of PLC?
A:-CPU
B:-Timer
C:-Communication interface
D:-DIMM
Ans: D
31:-In an SCR Holding current is
A:-Equal to latching current
B:-Less than Latching current
C:-Greater than Latching current
D:-Zero
Ans: B
32:-The synchronous speed of a synchronous motor is directly proportional to
A:-Number of poles
B:-Applied voltage
C:-Frequency of input voltage
D:-None of these
Ans: C
33:-Bandwidth of an FM radio station
A:-250 KHz
B:-175 KHz
C:-200 KHz
D:-10.5 KHz
Ans: C
34:-Number of Flip Flips required to construct a MOD-12 counter
A:-12
B:-6
C:-4
D:-3
Ans: C
35:-The IC 8279 is
A:-DMA controller
B:-PPI
C:-Interrupt controller
D:-Keyboard and Display Interface
Ans: D
36:-Which logic family has the lowest propagation delay?
A:-Standard TTL
B:-RTL
C:-HTL
D:-Schottky TTL
Ans: D
37:-Anti-fuse is related to
A:-SCR
B:-SRAM
C:-ASIC
D:-MOSFET
Ans: C
38:- is not a microprocessor.
A:-8088
B:-8086
C:-Z80
D:-8051
Ans: D
39:-What is the total power of an AM signal with 100 Watts carrier power and 100% depth of modulation?
A:-100 watts
B:-100 K watts
C:-150 watts
D:-150 K watts
Ans: C
40:-Foster-Seeley demodulator is
A:-AM Demodulator
B:-FM Demodulator
C:-PAM Demodulator
D:-PPM Demodulator
Ans: B
41:-SCR in reverse blocking mode, the junctions are reverse biased are
A:-J1 alone
B:-J2 and J3
C:-J2 Alone
D:-J1 and J3
Ans: D
42:-Snubber circuits are used in SCR circuit for
A:-To limit current
B:-To protect from high dv/dt
C:-Protect from over temperature
D:-None of these
Ans: B
43:-Which oscillator that can be fabricated in IC form?
A:-Relaxation Oscillator
B:-Crystal Oscillator
C:-RC Phase Shift Oscillator
D:-Wein Bridge Oscillator
Ans: A
44:-Base of a number system is also called
A:-Count
B:-Radix
C:-Value
D:-Nibble
Ans: B
45:-Divide by error interrupt in 8086 can initiated using
A:-RST 0
B:-by Resetting
C:-Using INTR
D:-INT 0
Ans: D
46:-Using three numbers of resistances number of combinations can be made.
A:-3
B:-4
C:-5
D:-2
Ans: B
47:-The ideal output resistance of a voltage amplifier is resistance.
A:-Unity
B:-Infinity
C:-1000
D:-Zero
Ans: D
48:-CMRR is related to
A:-Inverter
B:-Chopper
C:-Amplifier
D:-Op-Amp
Ans: D
49:-Capacity of a single layer Blu-Ray disc
A:-5.5 GB
B:-11 GB
C:-25 GB
D:-50 GB
Ans: C
50:-Nyquist sampling theorem is related to
A:-BPSK
B:-PPM
C:-PCM
D:-FDM
Ans: C
51:-The ideal data speed of 5 G mobile network
A:-20 GB/s
B:-5 GB/s
C:-1 GB/s
D:-22.5 GB/s
Ans: A
52:-The type of connector used in telephones
A:-RJ-45
B:-RJ-11
C:-RJ-10
D:-RJ-9
Ans: B
53:-Signals transmitted over several different paths is called
A:-Multi-user diversity
B:-Time diversity
C:-Space diversity
D:-None of these
Ans: C
54:-The light detector used in optical fibre communication
A:-PIN Diode
B:-APD
C:-(1) and (2)
D:-None
Ans: C
55:-Class C amplifiers are commonly used as Amplifiers.
A:-AF current
B:-AF voltage
C:-Radio frequency
D:-Pulse amplifier
Ans: C
56:-The number of select lines in a 1 to 8 de-multiplexer is
A:-2
B:-3
C:-4
D:-8
Ans: B
57:-Number of address lines required to address a memory system made of 2 modules of 1 MB memory chips
A:-12
B:-20
C:-21
D:-None of these
Ans: C
58:-A Karnaugh Map is an abstract form of diagram.
A:-Cycle diagram
B:-Block diagram
C:-Logical diagram
D:-Venn diagram
Ans: D
59:-A logic circuit that has memory is
A:-Sequential circuit
B:-Combinational circuit
C:-Both (1) and (2)
D:-None of these
Ans: A
60:-The basic block in an HDL program is called
A:-Object
B:-Gate
C:-Module
D:-Model instantiation
Ans: C
61:-Number of bits in a Binary Coded Decimal Number
A:-8
B:-4
C:-2
D:-1
Ans: B
62:-All Keywords in c programming is
A:-Lower case
B:-Upper case
C:-Both upper and lower cases
D:-Digits only
Ans: A
63:-In the specifications of a network interface card 10/100 stands for
A:-Length of Media
B:-Mega bits per second
C:-Protocol
D:-None of these
Ans: B
64:-Ripple factor of Halfwave rectifier is
A:-1.21
B:-0.482
C:-40.6
D:-81.2
Ans: A
65:-Major application of a Varactor diode is
A:-Rectifier
B:-Voltage doubler
C:-Demodulator
D:-Tuning circuit
Ans: D
66:-Cut-in voltage of a Germanium diode is
A:-0.2 V
B:-0.6 V
C:-1.0 V
D:-0.7 V
Ans: A
67:-Which of the following has highest internal resistance?
A:-A constant current source
B:-A constant voltage source
C:-Both of these
D:-None of these
Ans: A
68:-A DC current source has a short circuit current of 4 mA and an open-circuit voltage of 20 V. The internal resistance is
A:-5 KΩ
B:-100 Ω
C:-4 KΩ
D:-100 KΩ
Ans: A
69:-The overall gain of RC coupled amplifier is small due to
A:-Large bandwidth
B:-Loading effect of successive stages
C:-Impedance of capacitor
D:-None of these
Ans: B
70:-Intrinsic standoff ratio is the characteristics of
A:-Semi-conductor
B:-Tunnel diode
C:-FET
D:-UJT
Ans: D
71:-Stability of a circuit increases with
A:-Positive feedback
B:-Negative feedback
C:-Current series feedback
D:-Both (1) and (2)
Ans: B
72:-An emitter follower is
A:-Current series feedback circuit
B:-Voltage series feedback circuit
C:-Both (1) and (2)
D:-None of these
Ans: A
73:-The output frequency of a crystal oscillator is stable because of
A:-High Q of the crystal
B:-Low XL/R Ratio
C:-Rigid Crystal Structure
D:-Small size
Ans: A
74:-An Ideal Op-Amp has
A:-Zero output resistance
B:-Infinite Voltage gain
C:-Infinite input impedance
D:-All of these
Ans: D
75:-An example for wave shaping circuit is
A:-Astable Multi-vibrator
B:-RC Relaxation oscillator
C:-Schmitt Trigger
D:-None of these
Ans: C
76:-Number of diodes in a bridge rectifier is
A:-2
B:-4
C:-1
D:-None of these
Ans: B
77:-Bucking voltage is another name for
A:-Back emf
B:-Breakdown voltage
C:-Saturation voltage
D:-Knee voltage
Ans: A
78:-The gain of amplifier in RC phase shift oscillator should be
A:-180
B:-1
C:-28
D:-29
Ans: D
79:-In a PTC thermistor, the temperature at which resistance increases rapidly is known as
A:-Temperature coefficient
B:-Switching point
C:-Break point
D:-Valley point
Ans: B
80:-Forbidden energy gap of Germanium is
A:-0.72 eV
B:-1.12 eV
C:-1.1 eV
D:-2.1 eV
Ans: A
81:-Esaki diode is another name for
A:-Schottky Diode
B:-PIN Diode
C:-Tunnel Diode
D:-DIAC
Ans: C
82:-In a signed binary number, the sign used to indicate a negative number is
A:-0
B:-1
C:-00
D:-None of these
Ans: B
83:-Which one is a serial to parallel converter?
A:-Decoder
B:-Multiplexer
C:-De-Multiplexer
D:-Both (1) and (2)
Ans: C
84:-Number of modes of operations in TRIAC
A:-4
B:-2
C:-5
D:-1
Ans: A
85:-Which one is not a networking component?
A:-RS 232
B:-NIC
C:-Router
D:-Bridge
Ans: A
86:-How many bytes of bits addressable locations are present in 8051 microcontroller?
A:-20
B:-16
C:-8
D:-32
Ans: B
87:-Instruction queue size in 8086 is bytes.
A:-6
B:-8
C:-12
D:-16
Ans: A
88:-Number of transistors integrated in 8086 microprocessor
A:-32000
B:-29000
C:-20000
D:-64000
Ans: B
89:-Inelastic scattering of photon is defined by
A:-Hall effect
B:-Miller effect
C:-Multiple scattering
D:-Raman effect
Ans: D
90:-Rise time budget is related to
A:-Microwave link
B:-RF link
C:-Optical link
D:-None of these
Ans: C
91:-Johnson-Nyquist noise is another name for noise.
A:-Short noise
B:-Flicker noise
C:-Transit time noise
D:-Thermal noise
Ans: D
92:-According to , a spatially varying electric field is always associated with a magnetic field that changes over time.
A:-Lens law
B:-Faraday's law
C:-Flemings LH law
D:-Maxwells equations
Ans: D
93:-A hollow conductive metal pipe used for communication is called
A:-Microwave link
B:-Wave Guide
C:-Duct
D:-OFC
Ans: B
94:-Which one is not an embedded operation system?
A:-Android
B:-WebOS
C:-iOS
D:-Solaris
Ans: D
95:-The first Personal Computer (PC) was introduced by
A:-IBM
B:-Intel
C:-Microsoft
D:-Sun Microsystems
Ans: A
96:-IEEE 802.11 is the standard used for
A:-GSM
B:-CDMA
C:-Ethernet
D:-WLAN
Ans: D
97:-The point of intersection of DC and AC load lines is called
A:-Saturation point
B:-Cut-off point
C:-Operating point
D:-Peak point
Ans: C
98:-A zener diode that has very narrow depletion layer will breakdown by mechanism.
A:-Zener breakdown
B:-Avalanche breakdown
C:-Both (1) and (2)
D:-None of these
Ans: A
99:-In a multivibrator, we have feedback.
A:-Negative feedback
B:-50% positive feedback
C:-100% positive feedback
D:-None of these
Ans: C
100:-For display of signal pattern voltage is applied to the horizontal plates of a CRO.
A:-Sinusoidal
B:-Saw tooth
C:-Triangular
D:-Rectangular
Ans: B
A:-20 GB/s
B:-5 GB/s
C:-1 GB/s
D:-22.5 GB/s
Ans: A
52:-The type of connector used in telephones
A:-RJ-45
B:-RJ-11
C:-RJ-10
D:-RJ-9
Ans: B
53:-Signals transmitted over several different paths is called
A:-Multi-user diversity
B:-Time diversity
C:-Space diversity
D:-None of these
Ans: C
54:-The light detector used in optical fibre communication
A:-PIN Diode
B:-APD
C:-(1) and (2)
D:-None
Ans: C
55:-Class C amplifiers are commonly used as Amplifiers.
A:-AF current
B:-AF voltage
C:-Radio frequency
D:-Pulse amplifier
Ans: C
56:-The number of select lines in a 1 to 8 de-multiplexer is
A:-2
B:-3
C:-4
D:-8
Ans: B
57:-Number of address lines required to address a memory system made of 2 modules of 1 MB memory chips
A:-12
B:-20
C:-21
D:-None of these
Ans: C
58:-A Karnaugh Map is an abstract form of diagram.
A:-Cycle diagram
B:-Block diagram
C:-Logical diagram
D:-Venn diagram
Ans: D
59:-A logic circuit that has memory is
A:-Sequential circuit
B:-Combinational circuit
C:-Both (1) and (2)
D:-None of these
Ans: A
60:-The basic block in an HDL program is called
A:-Object
B:-Gate
C:-Module
D:-Model instantiation
Ans: C
61:-Number of bits in a Binary Coded Decimal Number
A:-8
B:-4
C:-2
D:-1
Ans: B
62:-All Keywords in c programming is
A:-Lower case
B:-Upper case
C:-Both upper and lower cases
D:-Digits only
Ans: A
63:-In the specifications of a network interface card 10/100 stands for
A:-Length of Media
B:-Mega bits per second
C:-Protocol
D:-None of these
Ans: B
64:-Ripple factor of Halfwave rectifier is
A:-1.21
B:-0.482
C:-40.6
D:-81.2
Ans: A
65:-Major application of a Varactor diode is
A:-Rectifier
B:-Voltage doubler
C:-Demodulator
D:-Tuning circuit
Ans: D
66:-Cut-in voltage of a Germanium diode is
A:-0.2 V
B:-0.6 V
C:-1.0 V
D:-0.7 V
Ans: A
67:-Which of the following has highest internal resistance?
A:-A constant current source
B:-A constant voltage source
C:-Both of these
D:-None of these
Ans: A
68:-A DC current source has a short circuit current of 4 mA and an open-circuit voltage of 20 V. The internal resistance is
A:-5 KΩ
B:-100 Ω
C:-4 KΩ
D:-100 KΩ
Ans: A
69:-The overall gain of RC coupled amplifier is small due to
A:-Large bandwidth
B:-Loading effect of successive stages
C:-Impedance of capacitor
D:-None of these
Ans: B
70:-Intrinsic standoff ratio is the characteristics of
A:-Semi-conductor
B:-Tunnel diode
C:-FET
D:-UJT
Ans: D
71:-Stability of a circuit increases with
A:-Positive feedback
B:-Negative feedback
C:-Current series feedback
D:-Both (1) and (2)
Ans: B
72:-An emitter follower is
A:-Current series feedback circuit
B:-Voltage series feedback circuit
C:-Both (1) and (2)
D:-None of these
Ans: A
73:-The output frequency of a crystal oscillator is stable because of
A:-High Q of the crystal
B:-Low XL/R Ratio
C:-Rigid Crystal Structure
D:-Small size
Ans: A
74:-An Ideal Op-Amp has
A:-Zero output resistance
B:-Infinite Voltage gain
C:-Infinite input impedance
D:-All of these
Ans: D
75:-An example for wave shaping circuit is
A:-Astable Multi-vibrator
B:-RC Relaxation oscillator
C:-Schmitt Trigger
D:-None of these
Ans: C
76:-Number of diodes in a bridge rectifier is
A:-2
B:-4
C:-1
D:-None of these
Ans: B
77:-Bucking voltage is another name for
A:-Back emf
B:-Breakdown voltage
C:-Saturation voltage
D:-Knee voltage
Ans: A
78:-The gain of amplifier in RC phase shift oscillator should be
A:-180
B:-1
C:-28
D:-29
Ans: D
79:-In a PTC thermistor, the temperature at which resistance increases rapidly is known as
A:-Temperature coefficient
B:-Switching point
C:-Break point
D:-Valley point
Ans: B
80:-Forbidden energy gap of Germanium is
A:-0.72 eV
B:-1.12 eV
C:-1.1 eV
D:-2.1 eV
Ans: A
81:-Esaki diode is another name for
A:-Schottky Diode
B:-PIN Diode
C:-Tunnel Diode
D:-DIAC
Ans: C
82:-In a signed binary number, the sign used to indicate a negative number is
A:-0
B:-1
C:-00
D:-None of these
Ans: B
83:-Which one is a serial to parallel converter?
A:-Decoder
B:-Multiplexer
C:-De-Multiplexer
D:-Both (1) and (2)
Ans: C
84:-Number of modes of operations in TRIAC
A:-4
B:-2
C:-5
D:-1
Ans: A
85:-Which one is not a networking component?
A:-RS 232
B:-NIC
C:-Router
D:-Bridge
Ans: A
86:-How many bytes of bits addressable locations are present in 8051 microcontroller?
A:-20
B:-16
C:-8
D:-32
Ans: B
87:-Instruction queue size in 8086 is bytes.
A:-6
B:-8
C:-12
D:-16
Ans: A
88:-Number of transistors integrated in 8086 microprocessor
A:-32000
B:-29000
C:-20000
D:-64000
Ans: B
89:-Inelastic scattering of photon is defined by
A:-Hall effect
B:-Miller effect
C:-Multiple scattering
D:-Raman effect
Ans: D
90:-Rise time budget is related to
A:-Microwave link
B:-RF link
C:-Optical link
D:-None of these
Ans: C
91:-Johnson-Nyquist noise is another name for noise.
A:-Short noise
B:-Flicker noise
C:-Transit time noise
D:-Thermal noise
Ans: D
92:-According to , a spatially varying electric field is always associated with a magnetic field that changes over time.
A:-Lens law
B:-Faraday's law
C:-Flemings LH law
D:-Maxwells equations
Ans: D
93:-A hollow conductive metal pipe used for communication is called
A:-Microwave link
B:-Wave Guide
C:-Duct
D:-OFC
Ans: B
94:-Which one is not an embedded operation system?
A:-Android
B:-WebOS
C:-iOS
D:-Solaris
Ans: D
95:-The first Personal Computer (PC) was introduced by
A:-IBM
B:-Intel
C:-Microsoft
D:-Sun Microsystems
Ans: A
96:-IEEE 802.11 is the standard used for
A:-GSM
B:-CDMA
C:-Ethernet
D:-WLAN
Ans: D
97:-The point of intersection of DC and AC load lines is called
A:-Saturation point
B:-Cut-off point
C:-Operating point
D:-Peak point
Ans: C
98:-A zener diode that has very narrow depletion layer will breakdown by mechanism.
A:-Zener breakdown
B:-Avalanche breakdown
C:-Both (1) and (2)
D:-None of these
Ans: A
99:-In a multivibrator, we have feedback.
A:-Negative feedback
B:-50% positive feedback
C:-100% positive feedback
D:-None of these
Ans: C
100:-For display of signal pattern voltage is applied to the horizontal plates of a CRO.
A:-Sinusoidal
B:-Saw tooth
C:-Triangular
D:-Rectangular
Ans: B
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