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Geography Waves and tides MCQ Questions for Class 11 Science

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Waves and tides Practice Questions

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समुद्री लहरों में सामान्यतः ऊर्जा किस माध्यम से आगे बढ़ती है?

In sea waves, through what does energy generally move forward?

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Correct Answer

A. जल की सतह पर तरंग गति सेThrough wave motion on water surface

Step 1

Concept

Waves carry energy forward while water particles mostly oscillate. For exams, distinguish energy movement and particle movement.

Step 2

Why this answer is correct

The correct answer is A. जल की सतह पर तरंग गति से / Through wave motion on water surface. Waves carry energy forward while water particles mostly oscillate. For exams, distinguish energy movement and particle movement.

Step 3

Exam Tip

लहरें ऊर्जा को आगे ले जाती हैं जबकि जल कण अधिकतर दोलन करते हैं। परीक्षा में ऊर्जा और जल कण की गति अलग समझें।

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लहरों की ऊंचाई बढ़ने का सबसे सरल कारण क्या हो सकता है?

What can be the simplest reason for increase in wave height?

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Correct Answer

B. हवा की गति बढ़नाIncrease in wind speed

Step 1

Concept

Strong wind gives more energy to waves. For exams, remember the relation between wind speed and wave height.

Step 2

Why this answer is correct

The correct answer is B. हवा की गति बढ़ना / Increase in wind speed. Strong wind gives more energy to waves. For exams, remember the relation between wind speed and wave height.

Step 3

Exam Tip

तेज हवा लहरों को अधिक ऊर्जा देती है। परीक्षा में हवा की गति और लहर ऊंचाई का संबंध याद रखें।

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लहर का गर्त किस भाग को कहते हैं?

Which part is called the trough of a wave?

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Correct Answer

C. सबसे निचला भागLowest part

Step 1

Concept

The trough is the lowest part of a wave. For exams, remember trough as opposite of crest.

Step 2

Why this answer is correct

The correct answer is C. सबसे निचला भाग / Lowest part. The trough is the lowest part of a wave. For exams, remember trough as opposite of crest.

Step 3

Exam Tip

गर्त लहर का सबसे निचला भाग है। परीक्षा में गर्त को शिखर के विपरीत याद रखें।

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लहर का शिखर किस भाग को कहते हैं?

Which part is called the crest of a wave?

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Correct Answer

D. लहर का सबसे ऊंचा भागHighest part of wave

Step 1

Concept

The crest is the highest part of a wave. For exams, connect crest with the raised part.

Step 2

Why this answer is correct

The correct answer is D. लहर का सबसे ऊंचा भाग / Highest part of wave. The crest is the highest part of a wave. For exams, connect crest with the raised part.

Step 3

Exam Tip

शिखर लहर का सबसे ऊंचा भाग होता है। परीक्षा में शिखर को ऊपर उठे भाग से जोड़ें।

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तरंगदैर्ध्य किस दूरी को कहते हैं?

Wavelength refers to which distance?

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A. दो लगातार शिखरों के बीच की दूरीDistance between two successive crests

Step 1

Concept

Wavelength is the horizontal distance from crest to crest or trough to trough. For exams, treat it as wave length.

Step 2

Why this answer is correct

The correct answer is A. दो लगातार शिखरों के बीच की दूरी / Distance between two successive crests. Wavelength is the horizontal distance from crest to crest or trough to trough. For exams, treat it as wave length.

Step 3

Exam Tip

तरंगदैर्ध्य शिखर से शिखर या गर्त से गर्त की क्षैतिज दूरी है। परीक्षा में इसे लहर की लंबाई मानें।

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तरंग काल का अर्थ क्या है?

What is the meaning of wave period?

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Correct Answer

B. दो लगातार शिखरों के गुजरने के बीच का समयTime between passage of two successive crests

Step 1

Concept

Wave period is related to time. For exams, understand period as time, not distance.

Step 2

Why this answer is correct

The correct answer is B. दो लगातार शिखरों के गुजरने के बीच का समय / Time between passage of two successive crests. Wave period is related to time. For exams, understand period as time, not distance.

Step 3

Exam Tip

तरंग काल समय से संबंधित है। परीक्षा में काल को दूरी नहीं, समय समझें।

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ज्वार-भाटा किस प्रकार की गति है?

Tides are what type of movement?

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Correct Answer

C. आवधिक समुद्री गतिPeriodic ocean movement

Step 1

Concept

Tides rise and fall at regular intervals. For exams, remember them as periodic movement.

Step 2

Why this answer is correct

The correct answer is C. आवधिक समुद्री गति / Periodic ocean movement. Tides rise and fall at regular intervals. For exams, remember them as periodic movement.

Step 3

Exam Tip

ज्वार-भाटा नियमित अंतराल पर चढ़ता और उतरता है। परीक्षा में इसे आवधिक गति के रूप में याद रखें।

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ज्वार-भाटा का प्रमुख खगोलीय कारण क्या है?

What is the main astronomical cause of tides?

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Correct Answer

D. चंद्रमा और सूर्य का गुरुत्वाकर्षणGravity of Moon and Sun

Step 1

Concept

The gravity of the Moon and Sun affects seawater. For exams, link tides with gravity.

Step 2

Why this answer is correct

The correct answer is D. चंद्रमा और सूर्य का गुरुत्वाकर्षण / Gravity of Moon and Sun. The gravity of the Moon and Sun affects seawater. For exams, link tides with gravity.

Step 3

Exam Tip

चंद्रमा और सूर्य का गुरुत्व समुद्री जल को प्रभावित करता है। परीक्षा में ज्वार को गुरुत्व से जोड़ें।

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उच्च ज्वार में तट के पास जल स्तर कैसा होता है?

During high tide, how is the water level near the coast?

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Correct Answer

A. ऊपर चढ़ा हुआRaised

Step 1

Concept

During high tide, water level is raised. For exams, connect high tide with rising water.

Step 2

Why this answer is correct

The correct answer is A. ऊपर चढ़ा हुआ / Raised. During high tide, water level is raised. For exams, connect high tide with rising water.

Step 3

Exam Tip

उच्च ज्वार में जल स्तर ऊपर होता है। परीक्षा में उच्च ज्वार को जल चढ़ने से जोड़ें।

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निम्न ज्वार में तट के पास जल स्तर कैसा होता है?

During low tide, how is the water level near the coast?

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Correct Answer

B. नीचे उतरा हुआLowered

Step 1

Concept

During low tide, water level falls. For exams, connect low tide with falling water.

Step 2

Why this answer is correct

The correct answer is B. नीचे उतरा हुआ / Lowered. During low tide, water level falls. For exams, connect low tide with falling water.

Step 3

Exam Tip

निम्न ज्वार में जल स्तर घटता है। परीक्षा में निम्न ज्वार को जल उतरने से जोड़ें।

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