# An antenna is considered to be in free space when into height above grounded is more than

1.  λ

2.  2λ

3.   3λ

4.  5λ

4

Explanation :
No Explanation available for this question

# Counterpose conductor ground system is used in case of

1.  Poor conductivity of soil

2.  Rocky earth

3.  High rise buildings in the vicinity

4.  All of these

4

All of these

Explanation :
No Explanation available for this question

# The bidirectional pattern of a broad side array can be converted into unidirectional by

1.   Maintaining the distance of λ/4 between the elements

2.  Maintaining the distance of λ/2 between the elements

3.  Installing an identical array behind the main array at distance λ/4 and exciting it by current leading in phase by 900

4.  Installing an identical array behind the main array at distance λ/2 and exciting it by current leading in phase by 1200

4

Installing an identical array behind the main array at distance λ/4 and exciting it by current leading in phase by 900

Explanation :
No Explanation available for this question

# For the circuit shown in the given figure, if the input impedance Z1 at port 1 is given by Z1 = K1 (s+2)/s+5 then the input impedance Z2 at port 2 will be

1.  K2 (s+3)/s+5

2.  K2 (s+2)/s+3

3.  K1 s/s+5

4.  K1 s/s+2

4

K1 s/s+5

Explanation :
No Explanation available for this question

# For V(s) = s(s+2)/s(s+1), the initial and final values of v(t) will be respectively

1.  1 and 1

2.  2 and 2

3.  2 and 1

4.  1 and 2

4

1 and 2

Explanation :
No Explanation available for this question

# The effective length of a tower radiator is

1.  1/2π

2.  1/π

3.   21/π

4.  0.75l

4

21/π

Explanation :
No Explanation available for this question

# Antenna best fed by a wavelength is

1.  Biconical

2.  Horn

3.  Helical

4.  Discone

4

Horn

Explanation :
No Explanation available for this question

# One of the basic components of a VHP omni-directional range(ODR) is

1.  Naural range

2.  Alford loop

4.  Cross-point indicator

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Cross-point indicator

Explanation :
No Explanation available for this question

# In the network shown in the given figure, if the votage v at the time considered is 20 V, thenat that time will be

1.  1 V/s

2.   2 V/s

3.  -2 V/s

4.   Zero

4

2 V/s

Explanation :
No Explanation available for this question

# The network function represents an

1.  RC impedance

2.  RL impedance

3.  RC impedance and an RL admittance

4.  RC admittance and an RL impedance

4