Class 11 Geography - Atmospheric Circulation and Weather Systems - General circulation of the atmosphere and planetary winds Medium Quiz

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ऊँचाई बढ़ने पर वायुदाब सामान्यतः क्यों घटता है?

Why does atmospheric pressure generally decrease with increasing altitude?

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Correct Answer

B. ऊपर वायु स्तंभ का भार कम हो जाता हैWeight of air column above decreases

Step 1

Concept

At higher altitude, the amount of air above is less, so pressure decreases. This is the key vertical rule of pressure.

Step 2

Why this answer is correct

The correct answer is B. ऊपर वायु स्तंभ का भार कम हो जाता है / Weight of air column above decreases. At higher altitude, the amount of air above is less, so pressure decreases. This is the key vertical rule of pressure.

Step 3

Exam Tip

ऊँचाई पर ऊपर स्थित वायु की मात्रा कम होती है, इसलिए दबाव घटता है। यह वायुदाब का सबसे महत्वपूर्ण ऊर्ध्वाधर नियम है।

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विषुवत रेखीय क्षेत्र में प्रायः निम्न वायुदाब क्यों पाया जाता है?

Why is low pressure generally found in the equatorial region?

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Correct Answer

A. वहाँ अधिक ताप से हवा ऊपर उठती हैStrong heating makes air rise there

Step 1

Concept

Strong heating at the equator warms air and makes it rise. This creates surface low pressure.

Step 2

Why this answer is correct

The correct answer is A. वहाँ अधिक ताप से हवा ऊपर उठती है / Strong heating makes air rise there. Strong heating at the equator warms air and makes it rise. This creates surface low pressure.

Step 3

Exam Tip

विषुवत क्षेत्र में तीव्र ऊष्मा से हवा गर्म होकर ऊपर उठती है। इसलिए सतही निम्न दाब बनता है।

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चक्रवात सामान्यतः किस प्रकार के दाब केंद्र से जुड़ा होता है?

A cyclone is generally associated with which type of pressure center?

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Correct Answer

A. निम्न दाब केंद्रLow-pressure center

Step 1

Concept

A cyclone usually has a low-pressure center. Air moves toward the center from surrounding areas.

Step 2

Why this answer is correct

The correct answer is A. निम्न दाब केंद्र / Low-pressure center. A cyclone usually has a low-pressure center. Air moves toward the center from surrounding areas.

Step 3

Exam Tip

चक्रवात का केंद्र सामान्यतः निम्न दाब का होता है। हवा आसपास से केंद्र की ओर आती है।

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प्रतिचक्रवात सामान्यतः किस दाब स्थिति से संबंधित होता है?

An anticyclone is generally related to which pressure condition?

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Correct Answer

B. उच्च दाब और नीचे उतरती वायुHigh pressure and descending air

Step 1

Concept

An anticyclone is linked with high pressure and descending air. It often brings stable weather.

Step 2

Why this answer is correct

The correct answer is B. उच्च दाब और नीचे उतरती वायु / High pressure and descending air. An anticyclone is linked with high pressure and descending air. It often brings stable weather.

Step 3

Exam Tip

प्रतिचक्रवात उच्च दाब और अवरोही वायु से जुड़ा होता है। इससे स्थिर मौसम की संभावना रहती है।

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यदि दो स्थानों के बीच दाबांतर अधिक है, तो पवन की गति सामान्यतः कैसी होगी?

If pressure difference between two places is large, how will wind speed generally be?

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Correct Answer

B. तेजFast

Step 1

Concept

A larger pressure difference creates a steeper pressure gradient and stronger wind. Link this with isobar spacing in exams.

Step 2

Why this answer is correct

The correct answer is B. तेज / Fast. A larger pressure difference creates a steeper pressure gradient and stronger wind. Link this with isobar spacing in exams.

Step 3

Exam Tip

अधिक दाबांतर से दाब प्रवणता तीव्र होती है और हवा तेज चलती है। परीक्षा में इसे समदाब रेखाओं की दूरी से जोड़ें।

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लगातार बढ़ता वायुदाब सामान्यतः किस मौसम परिवर्तन का संकेत दे सकता है?

Continuously rising atmospheric pressure may generally indicate which weather change?

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Correct Answer

A. अधिक स्थिर और साफ मौसमMore stable and clear weather

Step 1

Concept

Rising pressure is often linked with high pressure and stability. It may generally indicate improving weather.

Step 2

Why this answer is correct

The correct answer is A. अधिक स्थिर और साफ मौसम / More stable and clear weather. Rising pressure is often linked with high pressure and stability. It may generally indicate improving weather.

Step 3

Exam Tip

बढ़ता दबाव अक्सर उच्च दाब और स्थिरता से जुड़ता है। यह सामान्यतः मौसम सुधार का संकेत हो सकता है।

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वायुमंडल की निचली परतों में वायुदाब तेजी से घटने का मुख्य कारण क्या है?

What is the main reason atmospheric pressure decreases rapidly in the lower layers of the atmosphere?

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Correct Answer

C. निचली परतों में हवा अधिक सघन और संपीडित होती हैLower layers have denser and compressed air

Step 1

Concept

Due to gravity, lower layers contain denser air, so pressure falls quickly with height. For exams, remember the relation between density and altitude.

Step 2

Why this answer is correct

The correct answer is C. निचली परतों में हवा अधिक सघन और संपीडित होती है / Lower layers have denser and compressed air. Due to gravity, lower layers contain denser air, so pressure falls quickly with height. For exams, remember the relation between density and altitude.

Step 3

Exam Tip

गुरुत्व के कारण निचली परतों में हवा अधिक सघन रहती है, इसलिए ऊँचाई बढ़ते ही दाब तेजी से घटता है। परीक्षा में घनत्व और ऊँचाई का संबंध याद रखें।

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