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Miscellaneous·Easy

Consider the following statements: 1. The deflection in the wind direction due to the Coriolis force is more when the velocity of the wind is high. 2. Tropical cyclones do not develop at the equator because the Coriolis force is the minimum at the equator. Which of the statements given above is/are correct?

Consider the following statements:

1. The deflection in the wind direction due to the Coriolis force is more when the velocity of the wind is high.

2. Tropical cyclones do not develop at the equator because the Coriolis force is the minimum at the equator.

Which of the statements given above is/are correct?

Options

  1. a.

    1 only

  2. b.

    2 only

  3. c.

    Both 1 and 2

    Correct answer
  4. d.

    Neither 1 nor 2

Explanation

 

  • The rotation of the earth about its axis affects the direction of the wind. 
  • It deflects the wind to the right direction in the northern hemisphere and to the left in the southern hemisphere. The deflection is more when the wind velocity is high.
  • The Coriolis force is directly proportional to the angle of latitude. It is the maximum at the poles and is absent at the equator.
  • The Coriolis force acts perpendicular to the pressure gradient force. The pressure gradient force is perpendicular to an isobar. The higher the pressure gradient force, the more is the velocity of the wind and the larger is the deflection in the direction of the wind.
  • As a result of these two forces operating perpendicular to each other, in the low-pressure areas, the wind blows around it.
  • At the equator, the Coriolis force is zero and the wind blows perpendicular to the isobars. The low pressure gets filled instead of getting intensified. That is the reason why tropical cyclones are not formed near the equator.

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