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Beamwidth of an antenna depends upon | |
A. | shape of radiation pattern [Wrong Answer] |
B. | dimensions [Wrong Answer] |
C. | wavelength [Wrong Answer] |
D. | all of the above [Correct Answer] |
View Answer
Explanation:-
Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Choose correct option for a stable system :
I is true, II is true
I is true, II is false
I is false, II is true
I is false, II is false
⇒ HVDC transmission systems generally use
12 pulse converters
6 pulse converters
3 pulse converters
either 12 or 6 pulse converters
⇒ Figure shows the feedback network of one of the very popular types of sinusoidal oscillators. Which one is t
Weinbridge oscillator
Hartley oscillator
Colpitt's oscillator
R-C phase shift oscillator
⇒ In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will
be reduced by half
be doubled
be four times as high
be reduced to one fourth
⇒ How many distinct binary trees can be constructed with three nodes?
1
2
3
5
⇒ The ratio of active power to apparent power is known as __________ factor.
power
load
form
demand
⇒ If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative number the result is
a larger floating point number
a smaller floating point number
either (a) or (b) depending on the actual number
a negative floating point number
⇒ The range of values of a and b for which the linear time invariant system with impulse respon
|a| > 1, |b| > 1
|a| < 1, |b| < 1
|a| < 1, |b| > 1
|a| > 1, |b| < 1
⇒ Ground wave propagation is useful for
microwave
medium wave
short wave
long distance
⇒ In the above case the total power in the modulated wave double sideband, suppressed carrier AM will be
112 W
400 W
415 W
512 W
⇒ For a Hertz dipole antenna, the Half Power Beam Width (HPBW) in the E-plane is
360°
180°
90°
45°
⇒ It is found that a ship to ship communication suffers from fading. This can be avoided by using
space diversity
frequency diversity
broad band antenna
directional antenna
⇒
Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
⇒ Henry is equivalent to
Volts/Ampere
Weber/Volt
Weber/Ampere
Weber/Ampere^{2}
⇒ Wire-wound resistors are unsuitable for use at high frequencies because they
are likely to melt under excessive eddy current heat
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create more electrical noise
consume more power
⇒ TM_{01} mode in circular waveguide is analogous to
TM_{10} mode in square waveguide
TM_{11} mode in square waveguide
TM_{20} mode in square waveguide
TM_{02} mode in square waveguide
⇒ Which one of the following is loaded in the main memory by the bootstrap loader?
System data
User program
BIOS
Part of DOS
⇒ For a 12 pulse operation, the two 6 pulse units are fed by
Y - Y and Y - Y transformers
Δ - Δ and Δ - Δ transformers
Y - Y and Y - Δ transformers
Y - Δ and Y - Δ transformers
⇒ If f is the frequency of electromagnetic wave, f_{c} is cutoff frequency, then in a rectangular waveguide
attenuation is low when f > f_{c}
attenuation is low when f < f_{c}
attenuation is high when f < f_{c}
either (b) or (c)
⇒ Neper is
larger than a decibel
smaller than decibel
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none of the above
⇒ Class C amplifier is suitable for
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a wide frequency band
audio frequencies
either (b) or (c)
⇒ Flash ADC is
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parallel ADC
series-parallel ADC
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⇒ In which of these does thermionic emission occur?
LED
LCD
VF display
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⇒ Satellites used for international communication are called
cossort
domsat
marisat
intelsat
⇒ Which dc servomotor requires strongest permanent magnet?
Slotted armature
Surface wound armature
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⇒ The characteristic equation of an SR flip-flop in given by
Q_{n+1} = S + RQ_{n}
Q_{n+1} = RQ_{n} + SQ_{n}
Q_{n+1} = S + RQ_{n}
Q_{n+1} = S + RQ_{n}
⇒ The two outputs of RS flip-flop are
always low
always high
either low or high
always complementary
⇒ The statement that the line integral of magnetic field about any closed path is exactly equal to the direct current enclosed by that path, is known as
Ampere's circuital law
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Electrostatic's theory
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⇒ A video transmission system transmits 625 picture frames per second. Each frame consist of a 400 x 400 pixel grid with 64 intensity levels per pixel. The data rate of the system is
16 Mbps
100 Mbps
600 Mbps
6.4 Gbps
⇒ If V = 4 in the figure, the value of I_{s} is give
0.25
5/2 A
0
none
⇒ Choose correct option for a stable system :
- Roots of the characteristic equation of the system are real and negative
- Area within the impulse response is finite
I is true, II is true
I is true, II is false
I is false, II is true
I is false, II is false
⇒ HVDC transmission systems generally use
12 pulse converters
6 pulse converters
3 pulse converters
either 12 or 6 pulse converters
⇒ Figure shows the feedback network of one of the very popular types of sinusoidal oscillators. Which one is t
Weinbridge oscillator
Hartley oscillator
Colpitt's oscillator
R-C phase shift oscillator
⇒ In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will
be reduced by half
be doubled
be four times as high
be reduced to one fourth
⇒ How many distinct binary trees can be constructed with three nodes?
1
2
3
5
⇒ The ratio of active power to apparent power is known as __________ factor.
power
load
form
demand
⇒ If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative number the result is
a larger floating point number
a smaller floating point number
either (a) or (b) depending on the actual number
a negative floating point number
⇒ The range of values of a and b for which the linear time invariant system with impulse respon
|a| > 1, |b| > 1
|a| < 1, |b| < 1
|a| < 1, |b| > 1
|a| > 1, |b| < 1
⇒ Ground wave propagation is useful for
microwave
medium wave
short wave
long distance
⇒ In the above case the total power in the modulated wave double sideband, suppressed carrier AM will be
112 W
400 W
415 W
512 W
⇒ For a Hertz dipole antenna, the Half Power Beam Width (HPBW) in the E-plane is
360°
180°
90°
45°
⇒ It is found that a ship to ship communication suffers from fading. This can be avoided by using
space diversity
frequency diversity
broad band antenna
directional antenna
⇒
Assertion (A): The duty cycle of a class C amplifier affects the power dissipation of transistor
Reason (R): At higher harmonics the efficiency of a class C amplifier becomes poor
Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
⇒ Henry is equivalent to
Volts/Ampere
Weber/Volt
Weber/Ampere
Weber/Ampere^{2}
⇒ Wire-wound resistors are unsuitable for use at high frequencies because they
are likely to melt under excessive eddy current heat
exhibit unwanted inductive and capacitive effects
create more electrical noise
consume more power
⇒ TM_{01} mode in circular waveguide is analogous to
TM_{10} mode in square waveguide
TM_{11} mode in square waveguide
TM_{20} mode in square waveguide
TM_{02} mode in square waveguide
⇒ Which one of the following is loaded in the main memory by the bootstrap loader?
System data
User program
BIOS
Part of DOS
⇒ For a 12 pulse operation, the two 6 pulse units are fed by
Y - Y and Y - Y transformers
Δ - Δ and Δ - Δ transformers
Y - Y and Y - Δ transformers
Y - Δ and Y - Δ transformers
⇒ If f is the frequency of electromagnetic wave, f_{c} is cutoff frequency, then in a rectangular waveguide
attenuation is low when f > f_{c}
attenuation is low when f < f_{c}
attenuation is high when f < f_{c}
either (b) or (c)
⇒ Neper is
larger than a decibel
smaller than decibel
equal to 1 decibel
none of the above
⇒ Class C amplifier is suitable for
a narrow frequency band
a wide frequency band
audio frequencies
either (b) or (c)
⇒ Flash ADC is
serial ADC
parallel ADC
series-parallel ADC
successive approximation ADC
⇒ In which of these does thermionic emission occur?
LED
LCD
VF display
None
⇒ Satellites used for international communication are called
cossort
domsat
marisat
intelsat
⇒ Which dc servomotor requires strongest permanent magnet?
Slotted armature
Surface wound armature
Surface wound with stationary rotor
Either (a) or (b)
⇒ The characteristic equation of an SR flip-flop in given by
Q_{n+1} = S + RQ_{n}
Q_{n+1} = RQ_{n} + SQ_{n}
Q_{n+1} = S + RQ_{n}
Q_{n+1} = S + RQ_{n}
⇒ The two outputs of RS flip-flop are
always low
always high
either low or high
always complementary
⇒ The statement that the line integral of magnetic field about any closed path is exactly equal to the direct current enclosed by that path, is known as
Ampere's circuital law
Coulomb's law
Electrostatic's theory
None of the above
⇒ A video transmission system transmits 625 picture frames per second. Each frame consist of a 400 x 400 pixel grid with 64 intensity levels per pixel. The data rate of the system is
16 Mbps
100 Mbps
600 Mbps
6.4 Gbps
⇒ If V = 4 in the figure, the value of I_{s} is give
0.25
5/2 A
0
none