# Which of the following analog modulation scheme requires the minimum transmitted pow and minimum channel bandwidth

1.  VSB

2.  DSB-SC

3.  SSB

4.  AM

4

SSB

Explanation :
No Explanation available for this question

# A linear system is equivalently represented by two sets of state equations. X = AX + BU and W = CW + DU.The eigenvalues of  the  representations are also computed as  { λ} and  { μ}. Which one of the following statements is true

1.  [λ] = [μ] and X = W

2.  [λ] = [μ] and X ≠ W

3.  [λ] ≠ [μ] and X = W

4.   [λ] ≠ [μ] and X ≠ W

4

[λ] = [μ] and X = W

Explanation :
No Explanation available for this question

# Which one of the following polar diagrams corresponds to a lag network

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# Despite  the  presence  of  negative  feedback,  control  systems  still  have  problems  of instability because the

1.  components used have nonlinearities.

2.  dynamic equations of the subsystems are not known exactly.

3.  mathematical analysis involves approximations.

4.  system has large negative phase angle at high frequencies

4

components used have nonlinearities.

Explanation :
No Explanation available for this question

# The magnetic field intensity vector of a plane wave is given by    (x, y, z, t) = 10 sin (50000t + 0.004x +  y),where  y  denotes  the  unit  vector  in  y  direction.  The  wave  is  propagating  with  a  phase velocity

1.  5 × 104 m/s.

2.  - 3 × 108 m/s.

3.   - 1.25 × 107 m/s.

4.  3 × 108 m/s

4

- 1.25 × 107 m/s.

Explanation :
No Explanation available for this question

# Many circles are drawn in a Smith chart used for transmission line calculations. The circles shown in the figure represent

1.  unit circles.

2.  constant resistance circles.

3.  constant reactance circles.

4.  constant reflection coefficient circles

4

constant resistance circles.

Explanation :
No Explanation available for this question

# Refractive index of glass is 1.5. Find the wavelength of a beam of light with a frequency of 1014 Hz in glass. Assume velocity of light is 3 x 108 m/s in vacuum

1.  3 µm

2.  3 mm

3.  2 µm

4.  1 µm

4

2 µm

Explanation :
No Explanation available for this question

# In what range should Re(s) remain so that the Laplace transform of the function e(a + 2)t +5 exits

1.  Re (s) > a + 2

2.  Re (s) > a + 7

3.  Re (s) < 2

4.  Re (s) > a + 5

4

Re (s) > a + 2

Explanation :
No Explanation available for this question

# Given that matrix   the eigen vector is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

1.

2.

3.

4.

4