World Geography
2024
Winds and Cyclones

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:

D.Neither 1 nor 2
C.Both 1 and 2
B.2 only
A.1 only

Correct Answer: Option C

The Coriolis force, named after the French physicist who described it in 1844, is caused by the Earth's rotation and affects wind direction.

It deflects wind to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

The deflection increases with wind velocity, meaning Statement 1 is correct.

The Coriolis force is directly proportional to the latitude angle. It is maximum at the poles and absent at the equator. This makes Statement 2 correct.

The Coriolis force acts perpendicular to the pressure gradient force, which itself is perpendicular to an isobar. A higher pressure gradient force results in greater wind velocity and a larger deflection.

At the equator, the Coriolis force is zero, causing wind to blow perpendicular to isobars. This prevents low-pressure areas from intensifying, explaining why tropical cyclones do not form near the equator.

Hence, both statements 1 and 2 are correct.