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Objective Questions

Latest CUET PG Electronics Exam Question (Objective Questions), MCQ in English

Subjects : Electronics

Question Bank CUET PG (Electronics) Exam - English
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Electronics

Question 1Single Answer
For a JFET IDSS = 8 mA and peak voltage Vp = –8 V, what will be the drain current for gate to source voltage of –2V?
  1. A
    4.5 mA
  2. B
    8 mA 
  3. C
    16 mA 
  4. D
    12 mA
Question 2Single Answer
The leakage current in silicon p-n junction at room temperature is of the order of 
  1. A
    mA
  2. B
    mA
  3. C
    mmA 
  4. D
    Amp
Question 3Single Answer
A tree in a network has a
  1. A
    closed path
  2. B
    no closed path
  3. C
    no nodes
  4. D
    no branches
Question 4Single Answer
In the given network, Z11 is equal to 
  1. A
  2. B
  3. C
  4. D
Question 5Single Answer
Which is a three-terminal negative voltage regulator IC? 
  1. A
    78 XX
  2. B
    IC 723
  3. C
    LM 317
  4. D
    79 XX
Question 6Single Answer
Three identical stages have overall upper 3 dB frequency of 2 KHz and lower 3 dB frequency of 20 Hz. What is the value of fH of each stage?
  1. A
    13 KHz 
  2. B
    26 KHz
  3. C
    39 KHz 
  4. D
    52 KHz
Question 7Single Answer
A combinational circuit has inputs A, B and C and its K-map is as shown, the output of the circuit will be
  1. A
  2. B
  3. C
  4. D
Question 8Single Answer
The output f of the 4-to-1 Mux shown in the given figure is
  1. AXY + X
  2. BX + Y
  3. Cx  + y 
  4. DXY
Question 9Single Answer
Microprocessor 8086 allows floating point arithmetic calculations in
  1. A
    Maximum mode
  2. B
    Minimum mode
  3. C
    Both maximum and minimum modes
  4. D
    Neither in maximum nor in minimum mode
Question 10Single Answer
Which of the following chip is used in 8085 microprocessor 3-chip configuration? 
  1. A
    IC 8255 
  2. B
    IC 8155
  3. C
    IC 8251
  4. D
    IC 8257
Question 11Single Answer
C Language is a__________
  1. A
    High level language
  2. B
    Low level language
  3. C
    Machine level language
  4. D
    Middle level language
Question 12Single Answer
In a ‘C’ language expression, if the following expressions appear, which will be evaluated first? 
  1. A
    x + y 
  2. B
    x · y 
  3. C
    (x + y) 
  4. D
    x / y 
Question 13Single Answer
If  E =2m of a wave in free space, the value of magnetic field (H) is 
  1. A
  2. B
  3. C
  4. D
Question 14Single Answer
A 20 kW carrier is sinusoidally modulated by two carriers corresponding to modulation index of 30% and 40% respectively. The total radiated power is ​
  1. A
    25 kW 
  2. B
    22.5 kW
  3. C
    45.0 kW 
  4. D
    35.0 kW
Question 15Single Answer
ASCII code has 128 characters, which are binary coded. If a computer generates 106 characters per second, then minimum band width required to transmit this signal will be
  1. A
    1.4 mbps 
  2. B
    14 mbps
  3. C
    7 mbps 
  4. D
    0.7 mbps
Question 16Single Answer
When the current through SCR is greater than holding current, then the voltage across the SCR is
  1. A
    1.4 V
  2. B
    0 V
  3. C
    Supply voltage
  4. D
    Half the load voltage
Question 17Single Answer
Dispersion shifted wave length is   
  1. A
    800 nm
  2. B
    1550 nm
  3. C
    1310 nm 
  4. D
    1200 nm
Question 18Single Answer
The most suitable instrument for the measurement of voltage is
  1. A
    DVM 
  2. B
    Analog voltmeter
  3. C
    CRO 
  4. D
    DMM
Question 19Single Answer
The characteristic polynomial of a system is q(s) = 2s5 + s4 + 4s3 + 2s2 + 2s + 1The system is
  1. A
    Stable
  2. B
    Marginally stable
  3. C
    Unstable
  4. D
    Oscillatory
Question 20Single Answer
Consider the following four transistors :
1. CEmode 2. CCmode
3. MOSFET 4. FET
The correct order in which, the input impedance increases is 
  1. A
    1, 2, 4, 3
  2. B
    1, 2, 3, 4
  3. C
    1, 3, 2, 4 
  4. D
    4, 3, 2, 1
Question 21Single Answer
The correct order in which the power dissipation in transistor in power amplifiers decreases :
1. Class A 2. Class C
3. Class B 4. Class AB 
The correct order is 
  1. A
    1, 3, 2 and 4 
  2. B
    1, 3, 4 and 2
  3. C
    1, 2, 3, 4
  4. D
    4, 3, 2, 1
Question 22Single Answer
The following are the interrupts of 8085 microprocessor :
1. INTR 2. TRAP
3. RST 7.5 4. RST 5.5
The correct order in which these interrupts will be executed, if arrive simultaneously : 
  1. A
    1, 2, 3, 4 
  2. B
    2, 3, 1, 4
  3. C
    2, 3, 4, 1 
  4. D
    4, 1, 2, 3 
Question 23Single Answer
The following are the oscillators :
1. Crystal
2. Weinbridge
3. Colpitt’s
4. Tunnel diode oscillator
The correct sequence of decreasing order of the frequency of oscillation will be :
  1. A
    4, 1, 3, 2
  2. B
    4, 1, 2, 3
  3. C
    4, 3, 2, 1
  4. D
    4, 2, 3, 1
Question 24Single Answer
Following are the controllers :
1. On-off 2. PID
3. PI
The correct order of the decrease in error output is
  1. A
    1, 2, 3 
  2. B
    1, 3, 2
  3. C
    3 , 2,  1
  4. D
    3, 1, 2
Question 25Single Answer
An n-type silicon sample has a resistivity of 5 -cm at T = 300 K. If mobility is mn = 1350 cm2/V-s, then donor impurity concentration is 
  1. A
    2.86 × 10–14 cm–3 
  2. B
    9.25 × 1014 cm–3 
  3. C
    11.46 × 1015 cm–3
  4. D
    1.1 × 10–15 cm–3 
Question 26Single Answer
In a JFET, the amplification factory, transconductance gm and the dynamic drain resistance vd are related as.
  1. A200 
  2. B400 
  3. C200 
  4. D400 
Question 27Single Answer
The figure shown below, is symbol of
  1. A
    P-channel depletion MOSFET
  2. B
    P-channel enhancement MOSFET 
  3. C
    Complementary MOSFET 
  4. D
    P-channel JFET
Question 28Single Answer
If  What is the determinant of admittance matrix ?  
  1. A
    0
  2. B
    1
  3. C5
  4. D
Question 29Single Answer
If the branch in any network has a current source then the analysis is carried out by ______ analysis method. 
  1. A
    mesh
  2. B
    node 
  3. C
    supermesh 
  4. D
    supernode
Question 30Single Answer
The transfer function of RC low-pass filter network ​
  1. A
    RCs/1 + RCs
  2. B
    1/1 + RCs
  3. C
    RC/1 + RCs 
  4. D
    S/1 + RCs
Question 31Single Answer
Biasing is done in class A mode to  
  1. A
    save power
  2. B
    improve stability
  3. C
    reduce number of sources
  4. D
    both (B) and (C)
Question 32Single Answer
In analog computation, we use 
  1. A
    both integrator and differentiator 
  2. B
    only integrator 
  3. C
    only differentiator 
  4. D
    both in pair 
Question 33Single Answer
To obtain 30% feedback factor for the circuit shown below : 
  1. A
    R1 = 3R2 
  2. B
    2R1 = 5R2  
  3. C
    3R1 = 7R2 
  4. D
    5R1 = 9R2  
Question 34Single Answer
For IOLmax = 16 mA and IILmax = 0.0016 A,1he fan-out (low) is 
  1. A
    16 
  2. B
    10
  3. C
    1
  4. D
    1.6 
Question 35Single Answer
Which Boolean expression describes the output ‘X’ in the arrangement given below : 
  1. A
    X = a + (b · c) 
  2. B
    X = a · (b + c)
  3. C
    X = (a · b) + c 
  4. D
    X = a + b + c
Question 36Single Answer
The largest decimal number that can be stored in a MOD-64 counter is ​
  1. A
    64 
  2. B
    15
  3. C
    16 
  4. D
    63
Question 37Single Answer
What is the Register address which matches with the address of the stack ?
  1. A
    03H  
  2. B
    07H
  3. C
    013H 
  4. D
    13H 
Question 38Single Answer
In 8259, to avoid causing an interrupt due to an accidental noise pulse, the following action is done  
  1. A
    All unused interrupt lines are shorted together. 
  2. B
    All unused interrupt lines are connected to Vcc.
  3. C
    All unused interrupt lines are connected to ground.
  4. D
    All unused interrupt lines kept open. 
Question 39Single Answer
Which of the ports in 8255, in which part of the port pins can be used as input lines and part of the port pines can be used as output lines ? 
  1. A
    PA 
  2. B
    PB
  3. C
    PC
  4. D
    PD
Question 40Single Answer
Which loop structure would execute its statements atleast once even if the test condition fails for the first time itself? 
  1. A
    for 
  2. B
    if-else
  3. C
    do-while
  4. D
    while
Question 41Single Answer
The expression evaluates to false in
int 1 = 3, J =7;  
double f = 5.5, g = 4.5; 
char ch = ‘T’;
  1. A
     (1 < = 5) & & (ch = = ‘T’)
  2. B
    (1 < 8) 11 (ch = = ‘L’)
  3. C
    (f > = 6) 11 (1·j) < 15
  4. D
    (f + g) = = 10.011 i < 2
Question 42Single Answer
Word NEHA is to be entered in an array. Which array declaration is proper ? ​
  1. A
    Char name [4] = {‘N’, ‘E’, ‘H’, ‘A’};
  2. B
    Charname [5] = {‘N ‘E’, ‘H ‘A’ ‘’};
  3. C
    Charname [4] = “NEHA”; 
  4. D
    Charname [4] = ‘NEHA’;
Question 43Single Answer
A transmission line having 50W impedance is transmitted to a load of (40 + j 30) ohms. The VSWRis 
  1. A
    j 0.033
  2. B
    0.8 + j 0.6
  3. C
    2
  4. D
    1
Question 44Single Answer
An air filled rectangular waveguide has dimensions 6 cm × 4 cm. The cut off frequency for TE10 is
  1. A
    2.5 GHz
  2. B
    25 MHz
  3. C
    20.5 GHz
  4. D
    5 GHz
Question 45Single Answer
An antenna, when radiating, has a highly directional radiation pattern. When the antenna is receiving, its radiation pattern 
  1. A
    is more directive
  2. B
    is less directive
  3. C
    is same that of transmitting antenna
  4. D
    exhibits no directivity at all.
Question 46Single Answer
The modulation index of an AM wave in changed from 0 to 1. The transmitted power is
  1. A
    unchanged
  2. B
    halved
  3. C
    doubled
  4. D
    increased by 50 percent
Question 47Single Answer
In a low level AM system, amplifiers following the modulated stage must be ​
  1. A
    Linear devices
  2. B
    Harmonic device
  3. C
    Class C amplifier  
  4. D
    Non linear devices 
Question 48Single Answer
Indicate the false statement. The square of the thermal noise voltage generated by a resistor is proportional to  
  1. A
    its temperature 
  2. B
    its resistance 
  3. C
    Boltzmann constant
  4. D
    the bandwidth over which it is measured
Question 49Single Answer
The output of a dc motor depends mainly on  
  1. A
    Speed and torque
  2. B
    Speed and back emf
  3. C
    Speed and applied voltage
  4. D
    Speed and load resistance
Question 50Single Answer
Which one of the following is an adjustable IC voltage regulator?
  1. A
    IC7824
  2. B
    IC7912
  3. C
    LM338
  4. D
    IC7808
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