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UPSC CSE 2024 · PYQ · Climatology / Atmospheric Forces · easy

With reference to "Coriolis force", which of the following statements is/are correct? 1. It increases with increase in wind velocity. 2. It is maximum at the poles and is absent at the equator. Select the answer using the code given below:

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2✓ Correct
  4. D.Neither 1 nor 2

Explanation

The Coriolis force is given by F = 2mv sin(φ), where v is the velocity of the moving body and φ is the latitude. Statement 1 is correct because the magnitude of the Coriolis force is directly proportional to wind velocity — faster winds experience a greater deflecting force. Statement 2 is also correct because sin(φ) is maximum (= 1) at the poles (φ = 90°) and zero at the equator (φ = 0°), so Coriolis force is maximum at the poles and absent (zero) at the equator. Both statements are correct.
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