# A 200 volt(r.m.s) generator having an internal resistanmce of 200 ohm is feeding a loss-less transmission line. The characteristic impedance and the length of the line are 200 ohm and 10 m respectively. The line is terminated in a resistive load of 100 ohm. If the operating frequency is 37.5 Mhz calculate the a. Current drawn from the generator b. Magnitude and phase of the current flowing in the load c. Power delivered to the load

1.  1/3A, 1/3

2.  1/2A, 1/3

3.  1A, 1/3

4.  15A, 1/3

4

1/3A, 1/3<-900A, 9.875W

Explanation :
No Explanation available for this question

# The dominant mode in a rectangular waveguide is TE10, because this mode has

1.  No attention

2.  No cut-off

3.  No magnetic field component

4.  The highest cut-off wavelength

4

No magnetic field component

Explanation :
No Explanation available for this question

# The modes in a rectangular waveguide are denoted by TEmnTMmn where m and n are the eigen numbers along the larger and smaller dimensions of the waveguide smaller dimensions of the waveguide respectively. Which one of the following statements is

1.  The TM10 mode of the waveguide does not exist

2.  The TE10 mode of the waveguide does not exist

3.  The TM10 and the TE10 modes both exist and have the same cut-off frequencies

4.  The TM10 and the TM01 modes both exist and have same cut-off frequencies

4

The TM10 and the TE10 modes both exist and have the same cut-off frequencies

Explanation :
No Explanation available for this question

# Choose the correct statements. For a wave propagating in an air filled rectangular wave guide

1.   Guided wavelength is never less than the free space wavelength

2.  Wave impedance is never less than the free space impedance

3.   Phase velocity is never less than the free space velocity

4.  TEM mode is possible if the dimensions of the wave guide are properly chosen

4

Phase velocity is never less than the free space velocity

Explanation :
No Explanation available for this question

# The magnetic field along the propagation direction inside a propagation direction inside a rectangular wavelength with the cross section shown in the figure is Hz=3 cos (2.094 x 102x) cos(2.618 x 102y) cos (6.283 x 1010t- β z) The phase velocity vp of the wave inside the wavelength satisfies

1.   vp>c

2.  vp=c

3.  0

4.   vp=0

4

vp=0

Explanation :
No Explanation available for this question

# Two isotropic antennas are separated by a distance of two wavelengths. If both the antennas are fed with currents, the number of lobes in the radiation pattern in the horizontal plane is

1.   2

2.  4

3.  6

4.  8

4

6

Explanation :
No Explanation available for this question

# In a uniform linear array, four isotropic radiating elements are spaced λ/4 apart. The progressive phase shift between the elements required or forming the main beam at 600 off the end-fire is

4

Explanation :
No Explanation available for this question

# In the radiation pattern of s 3-element array of isotropic radiation equally spaced at distance of λ/4 it is required to place a null at an angle of 33.56 degrees off the end-fire direction. Calculate the progressive phase shifts to be applied to the elements. Also calculate the angle at which the main beam is placed for this phase distribution

1.  600, 520

2.  500, 520

3.  400, 520

4.  300, 520

4

600, 520

Explanation :
No Explanation available for this question

# 25 persons are in a room 15 of them play hockey 17 of them play football and 10 of them play both hockey and football. Then the number of persons playing neither hockey nor football is

1.   2

2.  17

3.  13

4.  3

4

3

Explanation :
No Explanation available for this question

1.   100

2.  10

3.  90

4.  95

4