Q.1

A certain system has transfer function a is a parameter. Consider the standard negative unity feedback configuration as shown below.

Which of the following statements is true?

  • The closed loop system in never stable for any value of a a
  • For some positive values of a, the closed loop system is stable, but not for all positive values
  • For all positive values of a, the closed loop system is stable
  • The closed loop system is stable for all values of a, both positive and negative
Q.2

A radar receiver has a noise figure ofdB atK having a bandwidth of 2.5 MHz. The minimum power it can receive is

  • 3.45 x 10-15 W
  • 1.38 x 10-15 W
  • 7.5 x 10-15 W
  • 93.15 x 10-15 W
Q.3

What is the propagation constant for air filled wave guide with dimensions a = 1.and b = 0.at 4.GHz?

  • 0.6698
  • 0.7698
  • 0.503
  • 0.6598
Q.4

A discrete time linear shift-invariant system has an impulse response h[n] with h[=h[= -h[-and zero otherwise. The system is given an input sequence x[n] with x[- x[-and zero otherwise. The number of nonzero samples in the output sequence y[n], and the value of y[are, respectively

  • 5, 2
  • 6, 2
  • 6, 1
  • 5, 3
Q.5

A radar receiver has a noise figure ofdB atK having a bandwidth of 2.5 MHz. The minimum power it can receive is

  • 3.45 x 10-15 W
  • 1.38 x 10-15 W
  • 7.5 x 10-15 W
  • 93.15 x 10-15 W
Q.6

Find Y- parameters

  • None of these
Q.7

A certain system has transfer function a is a parameter. Consider the standard negative unity feedback configuration as shown below.

Which of the following statements is true?

  • The closed loop system in never stable for any value of a a
  • For some positive values of a, the closed loop system is stable, but not for all positive values
  • For all positive values of a, the closed loop system is stable
  • The closed loop system is stable for all values of a, both positive and negative
Q.8


ωL =

  • 108 rad/sec
  • 104 rad/sec
  • 102 rad/sec
  • 10 rad/sec
Q.9

What is the propagation constant for air filled wave guide with dimensions a = 1.and b = 0.at 4.GHz?

  • 0.6698
  • 0.7698
  • 0.503
  • 0.6598
Q.10

A radar receiver has a noise figure ofdB atK having a bandwidth of 2.5 MHz. The minimum power it can receive is

  • 3.45 x 10-15 W
  • 1.38 x 10-15 W
  • 7.5 x 10-15 W
  • 93.15 x 10-15 W
Q.11

A n-channel JFET has IDSS = 2 mA, Gate to source voltage VGS = - 2 V and trans-conductance is 0.5 mW then pinch-off voltage is __________ .

  • - 2 V
  • 2 V
  • - 4 V
  • 4 V
Q.12

The truth table corresponding to the given input digital gate :

Q.13

A n-channel JFET has IDSS = 2 mA, Gate to source voltage VGS = - 2 V and trans-conductance is 0.5 mW then pinch-off voltage is __________ .

  • - 2 V
  • 2 V
  • - 4 V
  • 4 V
Q.14

What is the propagation constant for air filled wave guide with dimensions a = 1.and b = 0.at 4.GHz?

  • 0.6698
  • 0.7698
  • 0.503
  • 0.6598
Q.15

A discrete time linear shift-invariant system has an impulse response h[n] with h[=h[= -h[-and zero otherwise. The system is given an input sequence x[n] with x[- x[-and zero otherwise. The number of nonzero samples in the output sequence y[n], and the value of y[are, respectively

  • 5, 2
  • 6, 2
  • 6, 1
  • 5, 3
Q.16

A discrete time linear shift-invariant system has an impulse response h[n] with h[=h[= -h[-and zero otherwise. The system is given an input sequence x[n] with x[- x[-and zero otherwise. The number of nonzero samples in the output sequence y[n], and the value of y[are, respectively

  • 5, 2
  • 6, 2
  • 6, 1
  • 5, 3
Q.17

The truth table corresponding to the given input digital gate :

Q.18

The truth table corresponding to the given input digital gate :

0 h : 0 m : 1 s