Multiple Choice Questions

With reference to the atmospheric circulation of air consider the following Statement I Wind blows p...........

Geography and Environment (RAS) World climates

With reference to the atmospheric circulation of air, consider the following:

Statement-I: Wind blows perpendicular to the isobars at the equator

Statement-II: Coriolis force is zero at the equator

Which one of the following is correct in respect of the above statements?

Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I

Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I

Statement-I is correct but Statement-II is incorrect

Statement-I is incorrect but Statement-II is correct

Statement-I is correct: The pressure gradient force is perpendicular to an isobar and the wind blows perpendicular to isobars at the equator.
Statement-II is correct: The Coriolis force acts perpendicular to the pressure gradient force. The higher the pressure gradient force, the higher 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. Hence, Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I

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