Users Also Read
MCQ's Search Engine
Electrical Engineering
Mechanical Engineering
Civil Engineering
Automobile Engineering
Chemical Engineering
Computer Engineering
Electronics Engineering
Medical Science Engg
Tropospheric mode of propagation is used in | |
A. | UHF [Correct Answer] |
B. | VLF [Wrong Answer] |
C. | MF [Wrong Answer] |
D. | HF [Wrong Answer] |
View Answer
Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ In the circuit below, the diode is ideal. The voltage V is give
min(V_{i}, 1)
max(V_{i}, 1)
min (-V_{i}, 1)
max (-V_{i}, 1)
⇒ In 8085 microprocessor, how many lines are there in address bus?
6
8
12
16
⇒ A channel has a SNR of 7 and BW 4 kHz. Keeping the channel capacity (BPS) same, the BW is reduced to accommodate more channels. The SNR
decreases
increases
remains same
partially affected
⇒ In a 4 bit D/A converter, the offset error is the output voltage when input digital voltage is
1111
0
either 1111 or 0000
none of the above
⇒ When performing numerical calculations in floating point arithmetic
All
1 and 2 only
1 and 3 only
2 and 3 only
⇒ The turn on time of an SCR is 5 micro second. Its trigger pulse should have
short rise time with pulse width = 2.5 μs
long rise time with pulse width = 3 μs
short rise time with pulse width = 4 μs
long rise time with pulse width = 4 μs
⇒ The hot resistance of a tungsten lame is about 12 times its cold resistance. Accordingly, the cold resistance of a 60 Ω, 120 V lamp is about __________ ohm.
5
240
2
2880
⇒ In a 100% amplitude modulated signal, the power in the upper sideband when carrier power is to be 100 W and modulation system SSBSC, is
100 W
66 W
50 W
25 W
⇒ The system shown in figure remains stable wh
k £ - 1
-1 < k < 1
l < k < 3
k > 3
⇒ The ROC of sequence in the Z.T. of sequence x[n] = a^{n} ∪ [n] is
z > a
z < a
|z| > a
|z| < a
⇒ The currents fed to the two dipoles of turnstile antenna are
in phase
in quadrature
in phase opposition
either (a) or (c)
⇒ Refractive index of glass is 1.5. Find the wavelength of a beam of light with a frequency of 10^{14} Hz in glass. Assume velocity of light is 3 x 10^{8} m/sec in vacuum.
4 μm
3 μm
2 μm
1 μm
⇒ A linear discrete time system has the char. equation z^{3} - 0.81z = 0, the system is
stable
marginally stable
unstable
stability cannot be assessed from the given information
⇒ Troposphere is the upper part of the Earth's atmosphere which absorbs large quantities of Sun's radiations.
TRUE
FALSE
⇒ Wave A = 100 sin ωt and wave B = 100 cos ωt. Then
rms values of the two waves are equal
rms values of A is more than that of B
rms values of A is less than that of B
rms values of the two waves may or may not be equal
⇒ The OP-AMP circuit shown above represen
high pass filter
low pass filter
band pass filter
band reject filter
⇒ The series element of a band stop filter is
capacitive
inductive
parallel combination of L and C
series combination of L and C
⇒ A differentiating amplifier has capacitor in the input path.
TRUE
FALSE
⇒ Satellite communication uses frequencies in the range of
3 to 6 GHz
3-10 MHZ
10-50 GHz
100-200 GHz
⇒ Which of the following is correct?
y_{22} = z_{22}/|z|
y_{11} = z_{22}/|z|
z_{11} = y_{11}/|y|
z_{22} = y_{22}/|y|
⇒ For Disk partitioning th DOS command is
F DISK
H DISK
A DISK
D DISK
⇒ MUF is depend upon
electron density of the ionospheric layer
11 year sun spot cycle
received frequency by receiver
height of ionospheric layer
⇒ If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be
32 GB
16 GB
32 MB
16 MB
⇒ In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.
TRUE
FALSE
⇒ The amplifier used in bootstrap voltage sweep should have a gain of
1
+∞
-1
-∞
⇒ The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as
Matthiessen's rule
Debye rule
Curie rule
Onne's rule
⇒ The Kirchoff's laws fail in which of the following circuits?
Linear circuits
Non-linear circuits
Lumped parameters circuits
Distributed parameters circuits
⇒ Distances near the skip distance should be used for sky-wave propagation
to avoid the Faraday effect
to avoid tilting
to prevent sky-wave and upper ray interference
so as to exceed the critical frequency
⇒ What is the direction of address
Unidirectional into μp
Unidirection out of μp
Bidirectional
Mixed direction, i.e., some lines into up and some others out of μp
⇒ Out of multiplexer and demultiplexer, which can be used as a logic function generator?
Multiplexer only
Demultiplexer only
Both
None
⇒ In the circuit below, the diode is ideal. The voltage V is give
min(V_{i}, 1)
max(V_{i}, 1)
min (-V_{i}, 1)
max (-V_{i}, 1)
⇒ In 8085 microprocessor, how many lines are there in address bus?
6
8
12
16
⇒ A channel has a SNR of 7 and BW 4 kHz. Keeping the channel capacity (BPS) same, the BW is reduced to accommodate more channels. The SNR
decreases
increases
remains same
partially affected
⇒ In a 4 bit D/A converter, the offset error is the output voltage when input digital voltage is
1111
0
either 1111 or 0000
none of the above
⇒ When performing numerical calculations in floating point arithmetic
- Error may occur due to finite representation of numbers.
- Error may occur due to rounding.
- Error may occur due to finite representation of inherently infinite process.
All
1 and 2 only
1 and 3 only
2 and 3 only
⇒ The turn on time of an SCR is 5 micro second. Its trigger pulse should have
short rise time with pulse width = 2.5 μs
long rise time with pulse width = 3 μs
short rise time with pulse width = 4 μs
long rise time with pulse width = 4 μs
⇒ The hot resistance of a tungsten lame is about 12 times its cold resistance. Accordingly, the cold resistance of a 60 Ω, 120 V lamp is about __________ ohm.
5
240
2
2880
⇒ In a 100% amplitude modulated signal, the power in the upper sideband when carrier power is to be 100 W and modulation system SSBSC, is
100 W
66 W
50 W
25 W
⇒ The system shown in figure remains stable wh
k £ - 1
-1 < k < 1
l < k < 3
k > 3
⇒ The ROC of sequence in the Z.T. of sequence x[n] = a^{n} ∪ [n] is
z > a
z < a
|z| > a
|z| < a
⇒ The currents fed to the two dipoles of turnstile antenna are
in phase
in quadrature
in phase opposition
either (a) or (c)
⇒ Refractive index of glass is 1.5. Find the wavelength of a beam of light with a frequency of 10^{14} Hz in glass. Assume velocity of light is 3 x 10^{8} m/sec in vacuum.
4 μm
3 μm
2 μm
1 μm
⇒ A linear discrete time system has the char. equation z^{3} - 0.81z = 0, the system is
stable
marginally stable
unstable
stability cannot be assessed from the given information
⇒ Troposphere is the upper part of the Earth's atmosphere which absorbs large quantities of Sun's radiations.
TRUE
FALSE
⇒ Wave A = 100 sin ωt and wave B = 100 cos ωt. Then
rms values of the two waves are equal
rms values of A is more than that of B
rms values of A is less than that of B
rms values of the two waves may or may not be equal
⇒ The OP-AMP circuit shown above represen
high pass filter
low pass filter
band pass filter
band reject filter
⇒ The series element of a band stop filter is
capacitive
inductive
parallel combination of L and C
series combination of L and C
⇒ A differentiating amplifier has capacitor in the input path.
TRUE
FALSE
⇒ Satellite communication uses frequencies in the range of
3 to 6 GHz
3-10 MHZ
10-50 GHz
100-200 GHz
⇒ Which of the following is correct?
y_{22} = z_{22}/|z|
y_{11} = z_{22}/|z|
z_{11} = y_{11}/|y|
z_{22} = y_{22}/|y|
⇒ For Disk partitioning th DOS command is
F DISK
H DISK
A DISK
D DISK
⇒ MUF is depend upon
electron density of the ionospheric layer
11 year sun spot cycle
received frequency by receiver
height of ionospheric layer
⇒ If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be
32 GB
16 GB
32 MB
16 MB
⇒ In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.
TRUE
FALSE
⇒ The amplifier used in bootstrap voltage sweep should have a gain of
1
+∞
-1
-∞
⇒ The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as
Matthiessen's rule
Debye rule
Curie rule
Onne's rule
⇒ The Kirchoff's laws fail in which of the following circuits?
Linear circuits
Non-linear circuits
Lumped parameters circuits
Distributed parameters circuits
⇒ Distances near the skip distance should be used for sky-wave propagation
to avoid the Faraday effect
to avoid tilting
to prevent sky-wave and upper ray interference
so as to exceed the critical frequency
⇒ What is the direction of address
Unidirectional into μp
Unidirection out of μp
Bidirectional
Mixed direction, i.e., some lines into up and some others out of μp
⇒ Out of multiplexer and demultiplexer, which can be used as a logic function generator?
Multiplexer only
Demultiplexer only
Both
None