Q.1

Power gain of antenna equals directive gain in VHF and UHF range if and only if efficiency of the antenna is __________ .

  • 0.25
  • 0.5
  • 0.75
  • 1
Q.2

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.3

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.4

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.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

Find equivalent capacitance if each capacitance is 2 F.

  • 5/12 F
  • 12/5 F
  • 6/5 F
  • 5/6 F
Q.7

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.8

Find RAB

  • 2 Ω
  • 1.5 Ω
  • 3 Ω
  • None of the above
Q.9

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.10

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

Q.11

AkHz carrier wave modulatedatHz is applied to a resonant circuit tuned to a carrier frequency and having Q =What is the degree of modulation after transmission through this circuit?

  • 0.40
  • 0.20
  • 0.27
  • 0.54
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

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.14

The input 3-dB frequency is :

  • 100 Hz
  • 148 Hz
  • 100 kHz
  • None
Q.15

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.16

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.17

System is :

  • causal
  • stable
  • non causal
  • anticausal
Q.18

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.19

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.20

Find equivalent capacitance if each capacitance is 2 F.

  • 5/12 F
  • 12/5 F
  • 6/5 F
  • 5/6 F
Q.21

The feedback control system shown in the given figure represents

  • Type 0 system
  • Type 1 system
  • Type 2 system
  • Type 3 system
Q.22

Find RAB

  • 2 Ω
  • 1.5 Ω
  • 3 Ω
  • None of the above
Q.23

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.24

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.25

AkHz carrier wave modulatedatHz is applied to a resonant circuit tuned to a carrier frequency and having Q =What is the degree of modulation after transmission through this circuit?

  • 0.40
  • 0.20
  • 0.27
  • 0.54
Q.26

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.27

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.28

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.29

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.30

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

Q.31

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.32

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.33

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.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

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.36

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.37

Find equivalent capacitance if each capacitance is 2 F.

  • 5/12 F
  • 12/5 F
  • 6/5 F
  • 5/6 F
Q.38

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.39

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.40

Find RL for maximum power transfer.

  • 3 Ω
  • 1.125 Ω
  • 4.1785 Ω
  • None of these
Q.41

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.42

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.43

The feedback control system shown in the given figure represents

  • Type 0 system
  • Type 1 system
  • Type 2 system
  • Type 3 system
Q.44

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.45

Find RAB

  • 2 Ω
  • 1.5 Ω
  • 3 Ω
  • None of the above
Q.46

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.47

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.48

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.49

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.50

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
0 h : 0 m : 1 s