_______ is a major cause of the sporadic-E condition
A. Temperature inversions
B. Sunspots
C. Meteors
D. Wind shear

1 Answer

Answer :

B. Sunspots

Related questions

Description : What is the major cause of atmospheric or static noise? A. Sunspots B. Airplanes C. Meteor showers D. Thunderstorm

Last Answer : D. Thunderstorm

Description : In what region of the world is sporadic-E most prevalent? A. The equatorial regions B. The northern hemisphere C. The arctic regions D. The polar regions

Last Answer : A. The equatorial regions

Description : Statement-I: Optically active 2-idoibutane on treatment with `NaI` in acetone undergoes racemisation. Because Statement-II: Repeated Walden inversions

Last Answer : Statement-I: Optically active 2-idoibutane on treatment with `NaI` in acetone undergoes racemisation. ... Statement-1 is false, Statement-2 is true

Description : Which wind-shear condition results in a loss of airspeed? a. Decreasing headwind or tailwind b. Increasing headwind and decreasing tailwind c. Decreasing headwind and increasing tailwind d. Increasing headwind or tailwind

Last Answer : c. Decreasing headwind and increasing tailwind

Description : In how many different ways can the letters of the word 'SPORADIC' be arranged so that the vowels always come together? A) 120 2 B) 1720 C) 4320 D) 2160 E) 2400

Last Answer : Answer: C) The word 'SPORADIC' contains 8 different letters. When the vowels OAI are always together, they can be supposed to form one letter. Then, we have to arrange the letters SPRDC (OAI). Now, 6 ... be arranged among themselves in 3! = 6 ways. Required number of ways = (720 x 6) = 4320.

Description : What is the primary cause of atmospheric noise? A. Thunderstorm B. Lightning C. Thunderstorm and lightning D. Weather condition

Last Answer : B. Lightning

Description : Any suggestions on how to overcome sporadic bouts of crushing loneliness?

Last Answer : I would be greatful not To have children. You are free to do almost anything with out discussing it with a committee. I would just order a pizza with your favorite toppings, and chug name brand cola from ... ) for help. What I do is cry in the bathtub while listening to music until I feel better.

Description : Are you also experiencing sporadic Fluther lagginess?

Last Answer : Same here. Sometimes (about 25%) it takes 30+ seconds for a page to load and other times it is pretty much instant.

Description : Sporadic pain in groin?

Last Answer : answer:Welcome to Fluther, @Holly13. Even if one of the physicians in the forum answers your question the end of the answer will be see a doctor . We try to be helpful about telling people what things ... . If that's not in the guidelines, then it ought to be. I should read the guidelines someday.

Description : What is the best way to reduce or heal the sunspots on the face?

Last Answer : The best ways I know is to maybe go and see a dermatologist and they will examine your skin and prescribe a medication, aloe vera is very good for your skin. Green tea is a very good detoxifyer.

Description : What do sunspots solar prominence's and solar flares all have in common?

Last Answer : Need answer

Description : Radical cure of vivax malaria should be attempted in: A. Areas where only sporadic cases occur B. Endemic areas with effective vector control measures C. Endemic areas not covered by vector control D. Both ‘A’ and ‘B’ are correc

Last Answer : D. Both ‘A’ and ‘B’ are correc

Description : How Do Sunspots Affect Radio Reception?

Last Answer : How Do Sunspots Affect Radio Reception? In order to understand how sunspots effect radio reception, you need to understand that the light waves and radio waves that the sun emits are both ... range of the radio frequencies and have little or no effect upon UHF and microwave communication.

Description : ECE Board Exam March 1996 Atmospheric condition is controlled by A. humidity B. pressure C. temperature D. all of these

Last Answer : D. all of these

Description : The major cause of atmospheric or static noise are A. Thunderstorms B. Airplanes C. Meteor showers D. All of these

Last Answer : A. Thunderstorms

Description : What is the major cause of selective fading? A. Small changes in the beam heading at the receiving station. B. Large changes in the height of the ionosphere, as experience at the ... Phase differences between radio wave components of the same transmission, as experienced at the receiving station.

Last Answer : D. Phase differences between radio wave components of the same transmission, as experienced at the receiving station.

Description : What is the estimated medium wind loading in the Philippines for antenna tower design? A. 300 kph B. 100 kph C. 200 kph D. 250 kph

Last Answer : C. 200 kph

Description : What is the estimated medium wind loading in the Philippines for antenna tower design? A. 200 kph B. 250 kph C. 300 kph D. 100 kph

Last Answer : A. 200 kph

Description : What do people call meteors?

Last Answer : Shooting stars or falling stars.

Description : What is a group of meteors?

Last Answer : It is a shower of meteors.

Description : Why aren't there many meteors is in the troposphere?

Last Answer : Feel Free to Answer

Description : Why aren't there many meteors in the tromosphere?

Last Answer : because it hase gravity

Description : What is a group of meteors?

Last Answer : It is a shower of meteors.

Description : What is used to track meteors?

Last Answer : Communications satellites are used to track meteors to warn usif a meteor will hit Earth.

Description : How many meteors enter Earth's atmosphere every day?

Last Answer : Thousands each day. Most of them are tiny; the size of grains of sand or grains of rice. Only a few dozen per day are as big as a Baseball, and only a few per week are substantially larger.

Description : What is the difference between comet and meteors?

Last Answer : Comets are flying bits of rock that don't enter the earth's atmosphere and meteors are flying bits of iron stone or stony iron. Also meteors do enter the earth's atmosphere.

Description : The minor planets revolving between the orbits of Marsh and Jupiter are called (a) Asteroids (b) Comets (c) Meteors (d) Novas

Last Answer : Ans:(a)

Description : Which of the following is not a part of solar system ? (1) Asteroids (2) Meteors (3) Moon (4) None of the above

Last Answer : (4) None of the above Explanation: Our solar system consists of the Sun, the planets Mercuty, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. It includes : the satellites of the planets; numerous comets, asteroids, and meteoroids; and the interplanetary medium.

Description : How was the atmosphere on Earth first formed? (a) Spontaneous combustion. (b) By comets and meteors, which were much more common at that time, delivering volatiles. (c) Evaporation from the ocean. (d) Volcanic emissions.

Last Answer : (b) By comets and meteors, which were much more common at that time, delivering volatiles.

Description : The oxygen in the earth's atmosphere was probably produced by which of the following? w) volcanos x) photosynthetic organisms y) radioactive minerals z) meteors

Last Answer : ANSWER: X -- PHOTOSYNTHETIC ORGANISMS

Description : What condition occur when the refractive index of the air decreases with height much more rapidly the normal? A. Refraction B. Superrefraction C. Subrefraction D. Diffraction

Last Answer : B. Superrefraction

Description : What propagation condition is usually indicated when a VHF signal is received from a station over 500 miles away? A. D-layer absorption B. Faraday rotation C. Tropospheric ducting D. Moonbounce

Last Answer : C. Tropospheric ducting

Description : Width of frequency band just enough to ensure the transmission of information at a required rate and quality required, and under a specified condition and class of emission. A. Occupied bandwidth B. Transmission bandwidth C. Necessary bandwidth D. Frequency bandwidth

Last Answer : C. Necessary bandwidth

Description : In indication signal for a handshake form the DCE to the DTE in response to an active condition for the request to send a signal. A. Data transmission B. Clear to send C. Receive data D. Data set ready

Last Answer : B. Clear to send

Description : What propagation condition is usually indicated when a VHF signal is received from a station over 5000 miles away? A. Moonbounce B. D-layer absorption C. Tropospheric ducting D. Faraday rotation

Last Answer : C. Tropospheric ducting

Description : Which of the following described the very early standard that defines binary digits as space/mark line condition and voltage levels? A. V.4 B. V.2 C. V.1 D. V.5

Last Answer : C. V.1

Description : Average power of a radio transmitter supplied to the antenna transmission line by a transmitter during one radio frequency cycle taken under the condition of no modulation. A. Peak envelop power B. Rated power C. Carrier power D. Mean power

Last Answer : C. Carrier power

Description : The width of the frequency band which is just sufficient to ensure the transmission of information at the rate and with the quality required under a specified condition and class of emission. A. Occupied bandwidth B. Reference frequency C. Necessary bandwidth D. Frequency tolerance bandwidth

Last Answer : C. Necessary bandwidth

Description : Write down the condition for good differentiation .

Last Answer : 1.For good differentiation, the time period of the input signal must be greater than or equal to Rf C1 2.T > R f C1 Where, Rf is the feedback resistance 3.Cf is the input capacitance

Description : When antennas are closed to the ground, _______ polarization is ideal A. horizontally polarized B. vertically polarized C. circularly polarized D. both A and B

Last Answer : B. vertically polarized

Description : A practical dBrn measurement will almost always in a _______ number. A. positive B. negative C. imaginary D. fractional

Last Answer : A. positive

Description : External noise fields are measured in terms of _______. A. rms values B. dc values C. average values D. peak values

Last Answer : D. peak values

Description : Man-made noise is usually from _______. A. transmission over power lines and by ground wave B. sky-wave C. space-wave D. troposphere

Last Answer : A. transmission over power lines and by ground wave

Description : In data communication the transmission of binary signals will require _______. A. Same bandwidth as analog B. More bandwidth than analog C. Less bandwidth than analog D. Bigger cable diameter

Last Answer : B. More bandwidth than analog

Description : _______ is referred as the difference between available power and power budget? A. Fade margin B. Power margin C. Nominal gain D. Power dissipation

Last Answer : B. Power margin

Description : In regulation of public telecommunications carrier such as in the evaluation of new entrant, the following consideration shall be given emphasis to _______. A. Legal, technical and citizenship B. ... and kind of service C. Citizenship, capacity and financial D. Technical, legal and financial

Last Answer : D. Technical, legal and financial

Description : The extremely high frequency (EHF) band is in the radio spectrum range of _______. A. 30 to 300 kHz B. 30 to 300 GHz C. 3 to 30 MHz D. 3 to 30 GHz

Last Answer : B. 30 to 300 GHz

Description : In shipboard satellite dish antennas system, azimuth is referred as the _______. A. 0 to 90 degrees B. Vertical aiming of the antenna C. North to East D. Horizontal aiming of the antenna

Last Answer : D. Horizontal aiming of the antenna

Description : _______ is more prevalent in analog signals that have steep slopes or whose amplitudes vary rapidly. A. Peak limiting B. Quantization noise C. Granular noise D. Slope overload

Last Answer : D. Slope overload

Description : In satellite communication, the Geostationary satellites are conveniently located with respect to the equator at _______. A. 45 degrees latitude B. 90 degrees latitude C. 0 degrees latitude D. 5 degrees latitude

Last Answer : C. 0 degrees latitude