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Doctors Medicines MCQs Q&A

  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2.
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1 Answers

Option 4 : Neither 1 nor 2.

The correct answer is Neither 1 nor 2.

  • The winds belts girdling the planet are organized into three cells in each hemisphere namely, the Hadley cell, the Ferrel cell, and the Polar cell.

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  •  Hadley   cell  

     

     - This cell is a tropical air circulation that features air rising near the       equator, flowing poleward at a height of 10 - 15 Km above the earth's surface.
     Ferrel   cell  - This cell require upper-level-mid latitude. It occurs between the 30-60 degree North to 30-60 degree South.
     Polar   cell - It is the smallest and weakest cell. It extends between 60 - 70 degree north and south, to the poles.

 

  • All the mentioned cells exist in both the northern and southern hemisphere.
  • The Ferrel cell is a weak cell.
  • It is weak because it has neither a strong source of heat nor a strong sink, so the airflow and temperature within it are variable.
  • Because of this, the latitudes are sometimes called "Zone of mixing".
  • The Ferrel system acts as a heat pump with a coefficient of performance of 12.1. 
  • This cell is formed from 30-degree latitude to 60-degree latitude.
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