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Q112 (NDA-I/2024) Geography › World Physical Geography Official Key

Which of the following statements regarding cyclones and anti-cyclones is/are correct ? 1. In the Northern Hemisphere, cyclones rotate counter clockwise and anticyclones rotate clockwise. 2. Cyclones are often associated with cloudy or rainy weather, whereas anticyclones are often associated with fair weather. 3. In the Southern Hemisphere, the cyclonic spiral will be clockwise because the Coriolis force acts to the left. Select the answer using the code given below :

Explanation

All three statements are correct based on the principles of atmospheric circulation and the Coriolis effect:

  • Statement 1: In the Northern Hemisphere, the Coriolis force deflects moving air to the right. This causes air spiraling into a low-pressure center (cyclone) to rotate counter-clockwise and air spiraling out of a high-pressure center (anticyclone) to rotate clockwise.
  • Statement 2: Cyclones are characterized by rising air, which cools and condenses, typically leading to cloudy and rainy weather. Anticyclones involve sinking air, which warms and inhibits cloud formation, resulting in fair and clear weather.
  • Statement 3: In the Southern Hemisphere, the Coriolis force deflects moving air to the left. Therefore, air rushing into a low-pressure system is deflected to the left, creating a clockwise cyclonic rotation.
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SIMILAR QUESTIONS

CAPF · 2015 · Q113 Relevance score: 5.52

Consider the following statements relating to cyclone, anti cyclone and trade wind : 1. The wind direction is clockwise in the cyclone of northern hemisphere 2. The planetary wind that blows from north-east to north-west is known as north-east trade wind 3. The wind direction is anti clockwisc in the anticyclone of southern hemisphere 4. Both westerlies and trade winds originate from sub-tropical highs Which of the statements given above is/are correct ?

NDA-II · 2010 · Q5 Relevance score: 5.32

Consider the following statements I. In a cyclone, the direction of wind flow is counter clockwise in the northern hemisphere II. The tropica] cyclone fades away when it reaches land because there is no large supply of warm moist air Which of the statements given above is/are correct?

NDA-II · 2011 · Q57 Relevance score: 5.25

Which of the following statements is/are correct? I. Cyclone is a low pressure system. 2. The wind movement is clockwise in the cyclone of northern hemisphere. Select the correct answer using the code, given below :

NDA-II · 2014 · Q8 Relevance score: 4.90

Which of the following statements is/are correct? 1. The tropical cyclones of China Sea are called typhoons. 2. The tropical cyclones of the West Indies are called tornadoes. 3. The tropical cyclones of Australia are called willy- willies. 4. Formation of an anticyclone results in stormy weather condition. Select the correct answer using the code given below.

NDA-II · 2013 · Q61 Relevance score: 4.73

Which of the following statements about Tornadoes are correct? Tornadoes usually spin 1. anticlockwise in the northern hemisphere 2. clockwise in the southern hemisphere 3. clockwise in the northern hemisphere 4. anticlockwise in the southern hemisphere Select the correct answer using the code given below :