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- Question
The function of nitrogen in air is
Options- A. to make air a moderate supporter of combustion
- B. to maintain the density of air constant
- C. to prevent the hydrogen in air from exploding
- D. to reduce the poisonous nature of ozone in air
- Correct Answer
- to make air a moderate supporter of combustion
ExplanationIf air contained all oxygen and no nitrogen, everything would have burnt off
- 1. According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .
Options- A. a molecule
- B. a cation
- C. an anion
- D. an atom Discuss
- 2. The first death anniversary day of Sri Rajiv Gandhi was observed as the
Options- A. National Integration Day
- B. Peace and Love Day
- C. Secularism Day
- D. Anti-Terrorism Day Discuss
- 3. The mountains which come into being after the continental drift started, with the break up of the large land mass of pangola are
Options- A. young mountains
- B. old mountains
- C. volcanic mountains
- D. fold mountains Discuss
- 4. The dark lines in the solar spectrum are due to
Options- A. absorption of corresponding wavelengths by the outer layers of the sun
- B. destructive interference between waves of certain definite wavelengths
- C. absorption of corresponding wavelengths by the prism used in the photograph
- D. absence of corresponding wavelengths from the light emitted by the core of the sun Discuss
- 5. Which of the following has a least penetrating power?
Options- A. All have same penetrating power
- B. Beta Particles
- C. Alpha particles
- D. Gamma rays Discuss
- 6. Gypsum is added to cement clinker to
Options- A. increase the tensile strength of cement
- B. decrease the rate of setting of cement
- C. facilitate the formation of colloidal gel
- D. bind the particles of calcium silicate Discuss
- 7. The major events of Pre-Cambrian era include
Options- A. formation of crust, continents and oceans
- B. formation of crust, birth of oldest known rock, origin of life
- C. formation of present day atmosphere
- D. All of the above. Discuss
- 8. The low latitude zone of globe extends between
Options- A. Tropic of Capricorn and Cancer
- B. North pole to South pole
- C. Tropic of Capricorn and equator
- D. Equator and Tropic of Cancer Discuss
- 9. The most obvious effect of pressure on rocks is
Options- A. foliation
- B. lineation
- C. lithification
- D. the reorientation of mineral crystals Discuss
- 10. When measuring the characteristics of a small-signal amplifier, say for a radio receiver, one might be concerned with its "Noise..."?
Options- A. Fundamental
- B. Fall
- C. Force
- D. Figure Discuss
More questions
Correct Answer: a molecule
Correct Answer: Anti-Terrorism Day
Explanation:
May 21, the death anniversary of ex-prime minister of India, Shri Rajiv Gandhi is also observed as Anti Terrorism Day in India.
Correct Answer: young mountains
Correct Answer: absorption of corresponding wavelengths by the outer layers of the sun
Correct Answer: Alpha particles
Correct Answer: decrease the rate of setting of cement
Correct Answer: All of the above.
Correct Answer: Tropic of Capricorn and Cancer
Correct Answer: the reorientation of mineral crystals
Correct Answer: Figure
Explanation:
"Noise figure" is one critical parameter for determining the "quality" of a low-noise, small-signal, amplifier, and perhaps more importantly, the sensitivity of the overall receiver system. It is especially important for VHF (very high frequency) - and higher frequency - designs where most of the undesired "noise" (noise that masks or overpowers the desired signals) is generated internal to the electronics itself. In HF (high frequency) applications, atmospheric noise plays a much larger role in determining overall useful sensitivity, so a circuit's "noise figure" is less important.
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