Q.1

The input 3-dB frequency is :

  • 100 Hz
  • 148 Hz
  • 100 kHz
  • None
Q.2

The transfer function of a zero-order-hold system is :

  • (l/s)(l + e-sT)
  • (1/s)(1 - e-sT)
  • 1 - (l/s)e-sT
  • 1 + (1/s)e-sT
Q.3

2's complement representation of abit number (one sign bit andmagnitude bits) is FFFF. Its magnitude in decimal representation is

  • 0
  • 1
  • 32, 767
  • 65, 535
Q.4

System is :

  • causal
  • stable
  • non causal
  • anticausal
Q.5

The Boolean function realized by the logic circuit shown is

  • F = Σm(0, 1, 3, 5, 9, 10, 14)
  • F = Σm(2, 3, 5, 7, 8, 12, 13)
  • F = Σm(1, 2, 4, 5, 11, 14, 15)
  • F = Σm(2, 3, 5, 7, 8, 9, 12)
Q.6

The Boolean function realized by the logic circuit shown is

  • F = Σm(0, 1, 3, 5, 9, 10, 14)
  • F = Σm(2, 3, 5, 7, 8, 12, 13)
  • F = Σm(1, 2, 4, 5, 11, 14, 15)
  • F = Σm(2, 3, 5, 7, 8, 9, 12)
Q.7

Find equivalent capacitance if each capacitance is 2 F.

  • 5/12 F
  • 12/5 F
  • 6/5 F
  • 5/6 F
Q.8

The feedback control system shown in the given figure represents

  • Type 0 system
  • Type 1 system
  • Type 2 system
  • Type 3 system
Q.9

Find RAB

  • 2 Ω
  • 1.5 Ω
  • 3 Ω
  • None of the above
Q.10

The impulse response h(t) of a linear invariant continuous time system is given by h(t) = exp (- 2t) u(t), where u(t) denotes the unit step function. The output of this system to the sinusoidal input x(t) = 2cos(2t) for all time t, is

  • 0
  • 2-0.25 cos (2t - 0.125p)
  • 2-0.5 cos (2t - 0.125p)
  • 2-0.5 cos (2t - 0.25p)
Q.11

The impulse response h(t) of a linear invariant continuous time system is given by h(t) = exp (- 2t) u(t), where u(t) denotes the unit step function. The output of this system to the sinusoidal input x(t) = 2cos(2t) for all time t, is

  • 0
  • 2-0.25 cos (2t - 0.125p)
  • 2-0.5 cos (2t - 0.125p)
  • 2-0.5 cos (2t - 0.25p)
Q.12

In the circuit shown, all the transmission line sections are lossless. The Voltage Standing Wave Ration (VSWR) on theline is

  • 1.00
  • 1.64
  • 2.50
  • 3.00
Q.13

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.14

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.15

The logic function implemented by the following circuit at the terminal OUT is

  • P NOR Q
  • P NAND Q
  • P OR Q
  • P AND Q
Q.16

For a integrator circuit, Ri =KΩ, CF =μF. The input is a step dc voltage as shown below. Its output will be

Q.17

Consider the Schmitt trigger circuit shown below. A triangular wave which goes from -V toV is applied to the inverting input of the op-amp. Assume that the output of the op-amp moves from +V to -V. The voltage at the non-inverting switches between

  • -12 V and +12 V
  • -7.5 V and +7.5 V
  • -5 V and +5 V
  • 0 V and 5 V
Q.18

Consider the Schmitt trigger circuit shown below. A triangular wave which goes from -V toV is applied to the inverting input of the op-amp. Assume that the output of the op-amp moves from +V to -V. The voltage at the non-inverting switches between

  • -12 V and +12 V
  • -7.5 V and +7.5 V
  • -5 V and +5 V
  • 0 V and 5 V
Q.19

For the power amplifier circuit shown below, the maximum power dissipated by both output transistor is

  • 9.66 W
  • 30.11 W
  • 31.66 W
  • 33.66 W
Q.20

The region between a pin of parallel perfectly conducting planes of infinite extent is y and z directions is partially filled with a dielectric as shown below.

AGHz TE10 wave is incident on the air-dielectric interface. The VSWR at the interface is

  • - 2
  • 2
  • 0
  • 1
Q.21

The region between a pin of parallel perfectly conducting planes of infinite extent is y and z directions is partially filled with a dielectric as shown below.

AGHz TE10 wave is incident on the air-dielectric interface. The VSWR at the interface is

  • - 2
  • 2
  • 0
  • 1
Q.22

The Boolean function realized by the logic circuit shown is

  • F = Σm(0, 1, 3, 5, 9, 10, 14)
  • F = Σm(2, 3, 5, 7, 8, 12, 13)
  • F = Σm(1, 2, 4, 5, 11, 14, 15)
  • F = Σm(2, 3, 5, 7, 8, 9, 12)
Q.23

Find equivalent capacitance if each capacitance is 2 F.

  • 5/12 F
  • 12/5 F
  • 6/5 F
  • 5/6 F
Q.24

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.25

The impulse response h(t) of a linear invariant continuous time system is given by h(t) = exp (- 2t) u(t), where u(t) denotes the unit step function. The output of this system to the sinusoidal input x(t) = 2cos(2t) for all time t, is

  • 0
  • 2-0.25 cos (2t - 0.125p)
  • 2-0.5 cos (2t - 0.125p)
  • 2-0.5 cos (2t - 0.25p)
Q.26

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.27

The logic function implemented by the following circuit at the terminal OUT is

  • P NOR Q
  • P NAND Q
  • P OR Q
  • P AND Q
Q.28

A power ofW is radiated from an isotropic radiator. The power radiated peer unit solid angle and the power density at a distance ofkm from the antenna is respectively

  • 25 W, 10 W
    12-03-36-2.png
  • 7.96 W, 0.08 μW
  • 0.08 μ W, 7.96 W
Q.29

The feedback control system shown in the given figure represents

  • Type 0 system
  • Type 1 system
  • Type 2 system
  • Type 3 system
Q.30

The region between a pin of parallel perfectly conducting planes of infinite extent is y and z directions is partially filled with a dielectric as shown below.

AGHz TE10 wave is incident on the air-dielectric interface. The VSWR at the interface is

  • - 2
  • 2
  • 0
  • 1
Q.31

Find RAB

  • 2 Ω
  • 1.5 Ω
  • 3 Ω
  • None of the above
Q.32

In the circuit shown, all the transmission line sections are lossless. The Voltage Standing Wave Ration (VSWR) on theline is

  • 1.00
  • 1.64
  • 2.50
  • 3.00
Q.33

The logic function implemented by the following circuit at the terminal OUT is

  • P NOR Q
  • P NAND Q
  • P OR Q
  • P AND Q
Q.34

The region between a pin of parallel perfectly conducting planes of infinite extent is y and z directions is partially filled with a dielectric as shown below.

AGHz TE10 wave is incident on the air-dielectric interface. The VSWR at the interface is

  • - 2
  • 2
  • 0
  • 1
Q.35

A power ofW is radiated from an isotropic radiator. The power radiated peer unit solid angle and the power density at a distance ofkm from the antenna is respectively

  • 25 W, 10 W
    12-03-36-2.png
  • 7.96 W, 0.08 μW
  • 0.08 μ W, 7.96 W
Q.36

A power ofW is radiated from an isotropic radiator. The power radiated peer unit solid angle and the power density at a distance ofkm from the antenna is respectively

  • 25 W, 10 W
    12-03-36-2.png
  • 7.96 W, 0.08 μW
  • 0.08 μ W, 7.96 W
Q.37

Which of the following photodetector does not provide gain?

  • Phototransistor
  • Photoconductor
  • Avalanche photodiode
  • p-i-n photodiode
Q.38

A 2 bit binary multiplier can be implemented using

  • 2 inputs ANDs only
  • 2 inputs XORs and 4 input AND gates only
  • Two 2 inputs NORs and one XNOR gate
  • XOR gates and shift registers
Q.39

The materials not having negative temperature coefficient of resistivity are

  • metals
  • semiconductors
  • insulators
  • none of the above
Q.40

Inmicroprocessor, the interrupt enable flip-flop is reset by

  • DI instruction only
  • system RESET only
  • interrupt acknowledgment only
  • all of the above
Q.41

With which decoder it is possible to obtain many code conversions?

  • 2 line to 4 line
  • 3 line to 8 line
  • not possible with any decoder
  • 4 line to 16 line decoder
Q.42

What are the minimum number of 2 to 1 multiplexers required to generate a 2 input AND gate a 2 input Ex-OR gate?

  • 1 and 2
  • 1 and 3
  • 1 and 1
  • 2 and 2
Q.43

Which of the following stages has no phase inversion of the signal?

  • Two CE stages
  • Three CE stages
  • CE and CC stages
  • CE stage and emitter follower
Q.44

Which of the following flip-flop is used as a latch?

  • J K flip-flop
  • R S flip-flop
  • T flip-flop
  • D flip-flop
Q.45

Consider the following statements:
The klystron and travelling wave tube differ from each other,

  1. In TWT the microwave circuit is non- resonant.
  2. In klystron the microwave circuit is resonant.
  3. TWT uses attenuator.
  4. The wave is TWT is a non-propagating wave.
Which of the above statements are correct?
  • 1 and 2 only
  • 3 and 4 only
  • 1, 2 and 3
  • 2, 3 and 4
Q.46

Manganin, an alloy of copper and manganese, is used in

  • Soldering material
  • Heating elements
  • Ballast resistors
  • Standard resistances
Q.47

If (10)x x (10)x = (100)x; (100)x x (100)x = (10000)x then x can take value :

  • 2
  • 5
  • 10
  • all of these
Q.48

Multiple member of antennas are arranged in arrays in order to enhance what property?

  • Both directivity and bandwidth
  • Only directivity
  • Only bandwidth
  • Neither directivity nor bandwidth
Q.49

Which of the following transducers is most suitable for monitoring continuous variations in very fine thickness of a material?

  • Diaphragm
  • Capacitor
  • L.V.D.T.
  • Piezoelectric crystal.
Q.50

The characteristic equation of a control system is given as s4 + 8s3 + 24s2 + 32s + K =What is the range of values of K for this system to be stable?

  • 0 ≤ K < 80
  • 0 ≤ K < 100
  • 0 ≤ K < 2300
  • 0 ≤ K < 600
0 h : 0 m : 1 s