Q5 (NDA-I/2010) Geography › World Physical Geography › Atmospheric pressure winds Answer Verified

Statement I : Winds are deflected to their right in the northern hemisphere and to their left in the southern hemisphere. Statement II : The Earth’s axis is inclined.

Both the statements are individually true and Statement II is the correct explanation of Statement I

Both the statements are individually true but Statement II is not the correct explanation of Statement I

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Result

Your answer: — · Correct: B

Explanation

Statement I is true as winds are deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere due to the Coriolis effect [2][t1]. This phenomenon is a direct consequence of the Earth's rotation on its axis [c2][t4]. Statement II is also true; the Earth's axis is indeed inclined at an angle of approximately 23.5 degrees. However, the inclination of the axis is primarily responsible for the occurrence of seasons and the varying length of day and night, rather than the Coriolis deflection [t5]. The Coriolis force arises from the rotation of the Earth itself, not the tilt of its axis [c2][t8]. Therefore, while both statements are factually correct, Statement II does not provide the causal explanation for the deflection described in Statement I. The correct explanation for Statement I is the Earth's rotation.

Sources

[1] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 9: Atmospheric Circulation and Weather Systems > Coriolis Force > p. 79
[2] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 9: Atmospheric Circulation and Weather Systems > Coriolis Force > p. 78

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Statement I : Winds are deflected to their right in the northern hemisphere and to their left in the southern hemisphere. Statement II : The Earth’s axis is inclined.

Explanation

SIMILAR QUESTIONS

Statement I : In the northern hemisphere the ocean currents flowing from equator towards the north pole and from pole towards the equator are deflected to their right Statement II : This happens due to rotation of the Earth on the axis from west to east

Assertion (A) : Wind patterns are clockwise in the northern hemisphere and anticlockwise in the southern hemisphere. Reason (R) : The directions of wind patterns in the northern and the southern hemisphere are governed by the Coriolis effect.