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Assertion (A) : ‘Western Disturbances’ disturb the calm and quite weather of North and North– western India by causing cyclonic rains over the plains and snowfall in the mountains.
Reason (R) : Winter rainfall caused by them locally known as ‘Mahawat’ is of immense importance for the cultivation of Rabi crops.
  • a)
    Both (A) and (R) are true and (R) is the correct explanation of (A).
  • b)
    Both (A) and (R) are true and (R) is not the correct explanation of (A).
  • c)
    (A) is correct but (R) is wrong.
  • d)
    (A) is wrong but (R) is correct.
Correct answer is option 'B'. Can you explain this answer?
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Assertion (A) : ‘Western Disturbances’ disturb the calm and quite wea...
They disturb the calm and quiet weather of north and north western India by causing cyclonic rains over the plains and snowfall in the mountains.
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Assertion (A) : ‘Western Disturbances’ disturb the calm and quite wea...
Assertion (A) : ‘Western Disturbances’ disturb the calm and quite weather of North and North– western India by causing cyclonic rains over the plains and snowfall in the mountains.

Reason (R) : Winter rainfall caused by them locally known as ‘Mahawat’ is of immense importance for the cultivation of Rabi crops.

The correct answer is option 'B'. Both (A) and (R) are true, but (R) is not the correct explanation of (A).

Explanation:

Western Disturbances:
- Western Disturbances are a type of extra-tropical storm system that originates in the Mediterranean region.
- These disturbances move from west to east and affect the weather conditions in North India.
- They are responsible for bringing winter rainfall to the region, particularly in the states of Jammu and Kashmir, Himachal Pradesh, Uttarakhand, Punjab, Haryana, and Rajasthan.
- These disturbances are associated with the westerly jet streams in the upper troposphere.

Effect on Weather:
- Western Disturbances disturb the calm and quiet weather of North and North-western India.
- They bring cyclonic rains over the plains and snowfall in the mountains.
- These rains and snowfall are important for the agricultural activities in the region.
- The winter rainfall caused by Western Disturbances is locally known as ‘Mahawat’.
- This rainfall is of immense importance for the cultivation of Rabi crops.

Explanation of Assertion (A):
- The assertion states that Western Disturbances disturb the calm and quiet weather of North and North-western India by causing cyclonic rains over the plains and snowfall in the mountains.
- This is true as Western Disturbances are known to bring rainfall and snowfall to the region, disrupting the normal weather conditions.

Explanation of Reason (R):
- The reason states that the winter rainfall caused by Western Disturbances, locally known as ‘Mahawat’, is of immense importance for the cultivation of Rabi crops.
- This is also true as Rabi crops are sown in winter and depend on the availability of water for their growth.
- The winter rainfall brought by Western Disturbances provides the necessary water for the cultivation of Rabi crops.

Conclusion:
- Both the assertion and the reason are true.
- However, the reason does not provide a correct explanation for the assertion.
- The disturbance caused by Western Disturbances and the importance of winter rainfall for Rabi crops are two separate facts that are both true but not causally related.
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Read the source given below and answer the questions that follow:The cold weather season begins from midNovember in northern India and stays till February. December and January are the coldest months in the northern part of India. The temperature decreases from south to north. The average temperature of Chennai on the eastern coast, is between 24° C - 25° Celsius, while in the northern plains, it ranges between 10°C and 15° Celsius. Days are warm and nights are cold. Frost is common in the north and the higher slopes of the Himalayas experience snowfall.During this season, the northeast trade winds prevail over the country. They blow from land to sea and hence, for most parts of the country, it is a dry season. Some amount of rainfall occurs on the Tamil Nadu coast from these winds as, here they blow from sea to land.In the northern part of the country, a feeble high pressure region develops, with light winds moving outwards from this area. Influenced by the relief, these winds blow through the Ganga valley from the west and the northwest. The weather is normally marked by clear sky, low temperatures and low humidity and feeble, variable winds.A characteristic feature of the cold weather season over the northern plains is the inflow of cyclonic disturbances from the west and the northwest. These low-pressure systems originate over the Mediterranean Sea and western Asia and move into India, along with the westerly flow. They cause the much-needed winter rains over the plains and snowfall in the mountains. Although the total amount of winter rainfall locally known as ‘mahawat’ is small, they are of immense importance for the cultivation of ‘rabi’ crops.Q. Winter rainfall called _________ is of immense importance for the cultivation of _________ crops.

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Assertion (A) : ‘Western Disturbances’ disturb the calm and quite weather of North and North– western India by causing cyclonic rains over the plains and snowfall in the mountains.Reason (R) : Winter rainfall caused by them locally known as ‘Mahawat’ is of immense importance for the cultivation of Rabi crops.a)Both (A) and (R) are true and (R) is the correct explanation of (A).b)Both (A) and (R) are true and (R) is not the correct explanation of (A).c)(A) is correct but (R) is wrong.d)(A) is wrong but (R) is correct.Correct answer is option 'B'. Can you explain this answer?
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Assertion (A) : ‘Western Disturbances’ disturb the calm and quite weather of North and North– western India by causing cyclonic rains over the plains and snowfall in the mountains.Reason (R) : Winter rainfall caused by them locally known as ‘Mahawat’ is of immense importance for the cultivation of Rabi crops.a)Both (A) and (R) are true and (R) is the correct explanation of (A).b)Both (A) and (R) are true and (R) is not the correct explanation of (A).c)(A) is correct but (R) is wrong.d)(A) is wrong but (R) is correct.Correct answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Assertion (A) : ‘Western Disturbances’ disturb the calm and quite weather of North and North– western India by causing cyclonic rains over the plains and snowfall in the mountains.Reason (R) : Winter rainfall caused by them locally known as ‘Mahawat’ is of immense importance for the cultivation of Rabi crops.a)Both (A) and (R) are true and (R) is the correct explanation of (A).b)Both (A) and (R) are true and (R) is not the correct explanation of (A).c)(A) is correct but (R) is wrong.d)(A) is wrong but (R) is correct.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A) : ‘Western Disturbances’ disturb the calm and quite weather of North and North– western India by causing cyclonic rains over the plains and snowfall in the mountains.Reason (R) : Winter rainfall caused by them locally known as ‘Mahawat’ is of immense importance for the cultivation of Rabi crops.a)Both (A) and (R) are true and (R) is the correct explanation of (A).b)Both (A) and (R) are true and (R) is not the correct explanation of (A).c)(A) is correct but (R) is wrong.d)(A) is wrong but (R) is correct.Correct answer is option 'B'. Can you explain this answer?.
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