Q.1

As per Hall effect, if any specimen carrying a current I is applied in a transverse magnetic field B, then an electric field E is induced in the specimen in the direction.

  • parallel to I
  • perpendicular to B and parallel to I
  • parallel to I and B
  • perpendicular to both I and B
Q.2

Electric dipole is located at origin in a medium with εr =has a moment P = (4ax - 2ay + az ) nC. Then potential at (is:

  • 0.062
  • 0.027
  • 0.042
  • 0.072
Q.3

Consider the following statements regarding the properties of an R-L-C series circuit under resonance:

  1. Current in the circuit is in phase with applied voltage
  2. Voltage drop across capacitor C and inductance L are equal in magnitude.
  3. Voltage across the capacitor is equal in magnitude to the applied voltage.
  4. Current in the circuit is maximum.
Which of the above statements is/are correct?
  • 1 only
  • 1, 2 and 4
  • 2 and 4
  • 1, 3 and 4
Q.4

Which of the following devices is used at the first stage of an electronic voltmeter?

  • BJT
  • SCR
  • MOSFET
  • UJT
Q.5

In the silicon BJT circuit shown below, assume that the emitter area of transistor Q1 is half that of transistor Q2.

The value of current I0 is approximately

  • 0.5 mA
  • 2 mA
  • 9.3 mA
  • 15 mA
Q.6

Consider the following statements:
To draw a.c. equivalent circuit of a transistors, all

  1. d.c. sources are shorted
  2. a.c. sources are shorted
  3. d.c. sources are opened
  4. a.c. sources are connected to d.c. sources
Which of the above statements is/are correct?
  • 2 and 4
  • 1 and 2
  • 1 only
  • 3 and 4
Q.7

How many number of branches the root loci of the equation s(s + 2)(s ++ K(s += 0 have?

  • Zero
  • One
  • Two
  • Three
Q.8

Who developed the concept of time varying electric field producing a magnetic field?

  • Gauss
  • Faraday
  • Hertz
  • Maxwell
Q.9

The signal cos ωct + 0.5 cos ωmt sin ωct is

  • FM only
  • AM only
  • both AM & FM
  • neither AM nor FM
Q.10

Voice signal band limited to 3.4 KHz is sampled and pulse code modulated usingquantization levels. Ten such signals are time division multiplexed using one 5-bit synchronizing word every alternate frame. The minimum channel bandwidth required for transmission of the TDM signal is

  • 100 KHz
  • 200 KHz
  • 50 KHz
  • 150 KHz
Q.11

What are the counting stages (Q1, Q2) for the counter shown in the figure below?

  • 11, 10, 00, 11, 10, ...
  • 01, 10, 11, 00, 10, ...
  • 00, 11, 01, 10, 00, ...
  • 01, 10, 00, 01, 10, ...
Q.12

Which one of the following is a transferred electron device?

  • BARITT diode
  • IMPATT diode
  • TRAPATT diode
  • Gunn diode
Q.13

For a standard 2nd order system the maximum overshoot isto an unit step input. If the magnitude of the input is doubled, then maximum overshoot and percentage of maximum overshoot is:

  • maximum overshoot doubles and percentage of maximum overshoot is less than double
  • maximum overshoot doubles and percentage of maximum overshoot do not change
  • maximum overshoot remain same and percentage of maximum overshoot is double
  • maximum overshoot more than double and percentage of maximum overshoot is less than double
Q.14

Which of the following represent a wave equation for a tightly stretched elastic string of length l and 'm', mass per unit?

Q.15

Consider a situation where number of minterms with even number of 0's are same as number of minterms with odd number of 1's. Then minterms with even number of 0's and minterms with odd number of 1's are __________ to each other then number of variables is __________ .

  • equivalent, even
  • complement, odd
  • complement, even
  • none of these
Q.16

In the silicon BJT circuit shown below, assume that the emitter area of transistor Q1 is half that of transistor Q2.

The value of current I0 is approximately

  • 0.5 mA
  • 2 mA
  • 9.3 mA
  • 15 mA
Q.17

What are the counting stages (Q1, Q2) for the counter shown in the figure below?

  • 11, 10, 00, 11, 10, ...
  • 01, 10, 11, 00, 10, ...
  • 00, 11, 01, 10, 00, ...
  • 01, 10, 00, 01, 10, ...
Q.18

For a standard 2nd order system the maximum overshoot isto an unit step input. If the magnitude of the input is doubled, then maximum overshoot and percentage of maximum overshoot is:

  • maximum overshoot doubles and percentage of maximum overshoot is less than double
  • maximum overshoot doubles and percentage of maximum overshoot do not change
  • maximum overshoot remain same and percentage of maximum overshoot is double
  • maximum overshoot more than double and percentage of maximum overshoot is less than double
Q.19

Which of the following are the non-linear application of op-amp?

  1. Current-to-voltage converter
  2. Comparator
  3. Peak detector
  4. Limiter
Select the correct answer from the codes given below:
  • 1, 2 and 3
  • 2, 3 and 4
  • 1, 3 and 4
  • 1, 2 and 4
Q.20

Anexecutes the following instructions
LXI H, 30A0H
DAD H
PCHL

All addresses and constants are in Hex. Let PC be the contents of the program counter and HL be the contents of the HL register pair just after executing PCHL.
Which of the following statements is correct?

  • PC = 2715 H HL = 30A0 H
  • PC = 30A0H HL = 2715H
  • PC = 6104 H HL = 6140 H
  • PC = 6140H HL = 2715H
Q.21

Which of the transistor models is most preferred for the analysis of a transistor circuit both at mid-band and at high frequencies?

  • h-parameter model
  • y-parameter model
  • s-parameter model
  • hybrid-p model
Q.22

The amplifier network is shown below:

re and z0 is:

  • 6.42 kΩ, 5.6 kΩ
  • 6.42 Ω, (5.62) kΩ
  • 6.4kΩ, (5.62) kΩ
  • 6.42 Ω, 5.6 kΩ
Q.23

Which of the following represent a wave equation for a tightly stretched elastic string of length l and 'm', mass per unit?

Q.24

A system is described by following equations of state variables analysis.
, C = [1
The steady state error due to step input is:

Q.25

As per Hall effect, if any specimen carrying a current I is applied in a transverse magnetic field B, then an electric field E is induced in the specimen in the direction.

  • parallel to I
  • perpendicular to B and parallel to I
  • parallel to I and B
  • perpendicular to both I and B
Q.26

In the silicon BJT circuit shown below, assume that the emitter area of transistor Q1 is half that of transistor Q2.

The value of current I0 is approximately

  • 0.5 mA
  • 2 mA
  • 9.3 mA
  • 15 mA
Q.27

Consider the CMOS circuit shown, where the gate voltage VG of the n-MOSEFT is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3 V. Assume that, for both transistor, the magnitude of the threshold voltage is 1 V and the product of the transconductor parameter and the (W/L) ratio, i.e. the quality μC0x(W/L), is 1mA. V-2.

Estimate the output voltage V0 for VG = 1.5 V. [Hint: Use the approximate current voltage equation for each MOSEFT

Q.28

What are the counting stages (Q1, Q2) for the counter shown in the figure below?

  • 11, 10, 00, 11, 10, ...
  • 01, 10, 11, 00, 10, ...
  • 00, 11, 01, 10, 00, ...
  • 01, 10, 00, 01, 10, ...
Q.29

What are the counting stages (Q1, Q2) for the counter shown in the figure below?

  • 11, 10, 00, 11, 10, ...
  • 01, 10, 11, 00, 10, ...
  • 00, 11, 01, 10, 00, ...
  • 01, 10, 00, 01, 10, ...
Q.30

For a standard 2nd order system the maximum overshoot isto an unit step input. If the magnitude of the input is doubled, then maximum overshoot and percentage of maximum overshoot is:

  • maximum overshoot doubles and percentage of maximum overshoot is less than double
  • maximum overshoot doubles and percentage of maximum overshoot do not change
  • maximum overshoot remain same and percentage of maximum overshoot is double
  • maximum overshoot more than double and percentage of maximum overshoot is less than double
Q.31

Anexecutes the following instructions
LXI H, 30A0H
DAD H
PCHL

All addresses and constants are in Hex. Let PC be the contents of the program counter and HL be the contents of the HL register pair just after executing PCHL.
Which of the following statements is correct?

  • PC = 2715 H HL = 30A0 H
  • PC = 30A0H HL = 2715H
  • PC = 6104 H HL = 6140 H
  • PC = 6140H HL = 2715H
Q.32

Which of the transistor models is most preferred for the analysis of a transistor circuit both at mid-band and at high frequencies?

  • h-parameter model
  • y-parameter model
  • s-parameter model
  • hybrid-p model
Q.33

Given below a block diagram of oscillator circuit with various reactance elements.

For colpitts oscillator which is correct?

  • x1 = C, x2 = L, x3 = C
  • x1 = C, x2 = L, x3 = L
  • x1 = C, x2 = C, x3 = L
  • x1 = L, x2 = C, x3 = L
Q.34

Which of the following devices is used at the first stage of an electronic voltmeter?

  • BJT
  • SCR
  • MOSFET
  • UJT
Q.35

Inmicroprocessor, the interrupt enable flip-flop is reset by

  • DI instruction only
  • system RESET only
  • interrupt acknowledgment only
  • all of the above
Q.36

Consider the following statements regarding registers and latches:

  1. Registers are made of edge-triggered FFs, whereas latches are made from level-triggered FFs.
  2. Registers are temporary storage devices whereas latches are not.
  3. A latch employs cross-coupled feedback connections.
  4. A register stores a binary word whereas a latch does not.
Which of the above statements is/are correct?
  • 1 only
  • 1 and 3
  • 2 and 3
  • 3 and 4
Q.37

Which of the following devices is used at the first stage of an electronic voltmeter?

  • BJT
  • SCR
  • MOSFET
  • UJT
Q.38

Consider a situation where number of minterms with even number of 0's are same as number of minterms with odd number of 1's. Then minterms with even number of 0's and minterms with odd number of 1's are __________ to each other then number of variables is __________ .

  • equivalent, even
  • complement, odd
  • complement, even
  • none of these
Q.39

A system is described by following equations of state variables analysis.
, C = [1
The steady state error due to step input is:

Q.40

As per Hall effect, if any specimen carrying a current I is applied in a transverse magnetic field B, then an electric field E is induced in the specimen in the direction.

  • parallel to I
  • perpendicular to B and parallel to I
  • parallel to I and B
  • perpendicular to both I and B
Q.41

Following are the properties of impulse function

  1. x(t) ∂(t) = x (0)∂(t)
  2. ∂(- t) = ∂(t)
Choose the correct option
  • 1-true, 2-false, 3-true
  • 1-false, 2-true, 3-true
  • 1-true, 2-true, 3-true
  • 1-true, 2-true, 3-false
Q.42

For the circuit shown in the given figure, assuming ideal op-amps, the output corresponding to the given input will be :

Q.43

For the circuit shown in the given figure, assuming ideal op-amps, the output corresponding to the given input will be :

Q.44

Which of the following devices is used at the first stage of an electronic voltmeter?

  • BJT
  • SCR
  • MOSFET
  • UJT
Q.45

Thermal noise is passed through an ideal low-pass filter having cut-off at fc = ωHz. The auto correlation value of the noise at the output of the filter is given as

  • Triangular function over the range
  • Gaussian over the range -∞ ≤ t ≤ ∞
  • A Delta function at t = 0
  • Sin c function over the range - ∞ ≤ t ≤ ∞
Q.46

Who developed the concept of time varying electric field producing a magnetic field?

  • Gauss
  • Faraday
  • Hertz
  • Maxwell
Q.47

Consider the CMOS circuit shown, where the gate voltage VG of the n-MOSEFT is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3 V. Assume that, for both transistor, the magnitude of the threshold voltage is 1 V and the product of the transconductor parameter and the (W/L) ratio, i.e. the quality μC0x(W/L), is 1mA. V-2.

Estimate the output voltage V0 for VG = 1.5 V. [Hint: Use the approximate current voltage equation for each MOSEFT

Q.48

Voice signal band limited to 3.4 KHz is sampled and pulse code modulated usingquantization levels. Ten such signals are time division multiplexed using one 5-bit synchronizing word every alternate frame. The minimum channel bandwidth required for transmission of the TDM signal is

  • 100 KHz
  • 200 KHz
  • 50 KHz
  • 150 KHz
Q.49

Thermal noise is passed through an ideal low-pass filter having cut-off at fc = ωHz. The auto correlation value of the noise at the output of the filter is given as

  • Triangular function over the range
  • Gaussian over the range -∞ ≤ t ≤ ∞
  • A Delta function at t = 0
  • Sin c function over the range - ∞ ≤ t ≤ ∞
Q.50

Thermal noise is passed through an ideal low-pass filter having cut-off at fc = ωHz. The auto correlation value of the noise at the output of the filter is given as

  • Triangular function over the range
  • Gaussian over the range -∞ ≤ t ≤ ∞
  • A Delta function at t = 0
  • Sin c function over the range - ∞ ≤ t ≤ ∞
0 h : 0 m : 1 s