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Ground wave propagation is useful for | |
A. | microwave [Wrong Answer] |
B. | medium wave [Correct Answer] |
C. | short wave [Wrong Answer] |
D. | long distance [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Yettrium-iron garnet (Y_{2}Fe_{5}O_{12}) is a soft magnetic material suitable for applications involving
dc
50 Hz ac
ac of a few K Hz
ac of a few hundred MHz
⇒ When an atom of polarizability a is placed in an electric field E, the energy stored in atom is 0.5 a E^{2}.
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FALSE
⇒ Poynting vector is the rate of energy flow having
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⇒ __________ acts as a depolarizer in a dry cell.
ammonium chloride
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0
⇒ Millman's theorem is the best to find
equivalent voltage or current source
equivalent voltage source
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none of the above
⇒ An antenna is considered to be in free space where its height above the ground is
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⇒ In figure, D_{1} turns on
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⇒ Which of the following is active transducer?
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A-2, B-3, C-4, D-1
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⇒ In which of the following instructions of 8085 are the contents of accumulator complemented?
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⇒ A uniform plane wave travelling in air is incident on the plane boundary between air and another dielectric medium with ε_{r} = 4. The reflection coefficient for the normal incidence is
zero
0.5 ∠180°
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⇒ The number of spectral component of a cosine wave is
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⇒ If a linear time invartant system is exicited by a pure random signal like white noise, the output of the linear system will have which of the following properties?
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⇒ The given characteristic polynomial s^{4} + s^{3} + 2s^{2} + 2s + 3 = 0 has
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⇒ As compared to a p-n junction diode
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a Schottky diode has lower cut in voltage and higher reverse saturation current
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⇒ In figure, the switch S is initially open and steady state conditions are reached. At t = 0 switch is closed. The initial current through 2C capacito
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0.0416666666666667
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⇒ Yettrium-iron garnet (Y_{2}Fe_{5}O_{12}) is a soft magnetic material suitable for applications involving
dc
50 Hz ac
ac of a few K Hz
ac of a few hundred MHz
⇒ When an atom of polarizability a is placed in an electric field E, the energy stored in atom is 0.5 a E^{2}.
TRUE
FALSE
⇒ Poynting vector is the rate of energy flow having
W/m^{2}
W-m
kWh/s
W/m
⇒ __________ acts as a depolarizer in a dry cell.
ammonium chloride
carbon powder
manganese dioxide
zinc chloride
⇒ If operator 'a' = 1 ∠120° then (1 + a + a^{2}) =
-a
-a^{2}
1
0
⇒ Millman's theorem is the best to find
equivalent voltage or current source
equivalent voltage source
equivalent voltage and resistance of a circuit
none of the above
⇒ An antenna is considered to be in free space where its height above the ground is
λ
2λ
less than 3λ
more than 5λ
⇒ A 12 kHz pulse wave-form is amplified by a circuit having an Upper cut-off frequency of 1 MHz. The minimum input pulse width that can be accurately reproduced is
83.33 μ sec
1 μ sec
0.1 m sec
3.5 m sec
⇒ In figure, D_{1} turns on
v_{i} is more than V_{1}
v_{i} is less than V_{1}
v_{i} is between V_{1} and V_{2}
none of the above
⇒ In an ideal diode there is no breakdown, no __________ current, and no forward __________ drop.
reverse, voltage
forward, current
forward, voltage
reverse, current
⇒ Which of the following is active transducer?
Photoelectric
Photovoltaic
Photoconductive
Photoemissive
⇒
Match the following:
List I (Set operation) | List II (Set operator) | ||
---|---|---|---|
A. | Set equality | 1. | - |
B. | Set inclusion | 2. | = |
C. | Set intersection | 3. | < = |
D. | Set difference | 4. | ∗ |
A-2, B-3, C-4, D-1
A-3, B-2, C-4, D-1
A-1, B-2, C-3, D-4
A-4, B-2, C-3, D-1
⇒ The scale of dynamometer wattmeter is non linear.
TRUE
FALSE
⇒ A choke coil of resistance R and inductance L is shunted by capacitor C. The dynamic resistance is
R/LC
C/RL
L/RC
1/RLC
⇒ In which of the following instructions of 8085 are the contents of accumulator complemented?
STC
CMC
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RAL
⇒ If f(- t) = f(t), the function f(t) has only cosine terms.
TRUE
FALSE
⇒ Which of the following noise sources is different from others?
Cosmic
Solar
Atmospheric
Galactic
⇒ In a computer the instructions, data, intermediate and final results during processing are held in ALU.
TRUE
FALSE
⇒ A uniform plane wave travelling in air is incident on the plane boundary between air and another dielectric medium with ε_{r} = 4. The reflection coefficient for the normal incidence is
zero
0.5 ∠180°
0.33 ∠0°
0.33 ∠180°
⇒ The number of spectral component of a cosine wave is
1
0
2
4
⇒ If poles lie in first quadrant, damping ratio is
1
more than 1
less than 1
zero
⇒ If a linear time invartant system is exicited by a pure random signal like white noise, the output of the linear system will have which of the following properties?
Output will be a white noise
Output will be periodic
Output will be random
Output will be correlated or coloured noise
⇒ Which wave is also called surface wave?
Ground wave
Sky wave
Space wave
Both (b) and (c)
⇒ The autocorrelation function of the white noise is
impulse function
step function
constant
none of the above
⇒ Consider the following tasks in a micro computer
- Receiving data and instruction
- Performing arithmetic computation
- Performing logical computations
- Storing data and instructions
2 only
2 and 3 only
1, 2 and 3 only
All
⇒ In DTL the junction transistor serves as
inverter
buffer amplifier
both (a) and (b)
none of the above
⇒ The given characteristic polynomial s^{4} + s^{3} + 2s^{2} + 2s + 3 = 0 has
zero root in RHS of s-plane
one root in RHS of s-plane
two roots in RHS of s-plane
three roots in RHS of s-plane
⇒ As compared to a p-n junction diode
a schottky diode has lower cut in voltage and lower reverse saturation current
a schottky diode has higher cut in voltage and higher reverse saturation current
a Schottky diode has lower cut in voltage and higher reverse saturation current
a schottky diode has higher cut in voltage and lower reverse saturation current
⇒ In figure, the switch S is initially open and steady state conditions are reached. At t = 0 switch is closed. The initial current through 2C capacito
zero
0.0416666666666667
0.0833333333333333
0.125
⇒ For 8 bit representation the minimum positive and minimum negative numbers are
2^{-128} each
2^{-28} and 2^{-127}
2^{-127} and 2^{-128}
2^{-127}each