Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q96 (NDA-II/2017) Geography › World Physical Geography › Atmospheric pressure winds Answer Verified

The Coriolis effect is the result of

Result
Your answer: —  Â·  Correct: C
Explanation

The Coriolis effect is an apparent force caused by the Earth's rotation on its axis [5]. As the Earth spins in a counter-clockwise direction, objects moving freely over long distances appear to be deflected from a straight path [4]. This occurs because the Earth's rotational speed varies with latitude, being fastest at the equator and decreasing toward the poles [3]. Consequently, moving objects are deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere, a phenomenon known as Ferrel's Law [5]. The magnitude of this force is directly proportional to the sine of the latitude; it is zero at the equator and reaches its maximum at the poles [4]. While the pressure gradient force initiates wind movement, the Coriolis force modifies its direction due to the planet's rotation [4].

Sources

  1. [3] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 9: Atmospheric Circulation and Weather Systems > Forces Affecting the Velocity and Direction of Wind > p. 78
  2. [5] CONTEMPORARY INDIA-I ,Geography, Class IX . NCERT(Revised ed 2025) > Chapter 4: Climate > Pressure and Winds > p. 28
  3. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 23: Pressure Systems and Wind System > Causes of The Coriolis Effect > p. 308
  4. [4] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 9: Atmospheric Circulation and Weather Systems > Coriolis Force > p. 79
  5. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 23: Pressure Systems and Wind System > Causes of The Coriolis Effect > p. 309
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
50%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CDS-I · 2015 · Q44 Relevance score: 2.24

The horizontal wind circulation near the Earth’s surface is due to the 1. pressure gradient. 2. frictional force. 3. coriolis force. Select the correct answer using the code given below :

CDS-I · 2012 · Q72 Relevance score: 1.14

Consider the following state- ments : 1. Coriolis effect is zero at the Equator. 2. Coriolis effect is more towards the Poles. 3. Coriolis effects are related to the decreasing rotational velocity with increasing latitudes. 4. Coriolis effects are related to the increasing rotational velocity with increasing latitudes. Which of the statements given above are correct ?

NDA-I · 2025 · Q91 Relevance score: 1.08

Which of the following statements with reference to Coriolis force is/are correct ? 1. Coriolis force acts perpendicular to the pressure gradient force 2. At the equator, the Coriolis force is zero and the wind blows perpendicular to the isobars Select the answer using the code given below :

CAPF · 2012 · Q51 Relevance score: -0.42

Hurricanes rarely form or move within 5 degrees of the equator, because

NDA-II · 2013 · Q90 Relevance score: -1.16

Which one among the following is not a factor that affects direction of wind?