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Wave Motion — Practice Quiz

ICSE · Class 11 · Physics

Try a 4-question quiz on Wave Motion for ICSE Class 11 Physics: tap an answer to check it and see why. 60 questions in the full chapter test.

60 questions38 flashcards15 formulas & key relations5 concepts

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A comparison showing the key differences between mechanical waves (requiring a medium, e.g., sound, water waves) and electromagnetic waves (not requiring a medium, e.g., light, radio waves). Include e
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Quick Quiz: Wave Motion

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Tap an answer to check it instantly. No sign-up needed for these 4.

1

A pulse travels along a heavy uniform rope of length 16 m hanging vertically. Find the time taken for the pulse to travel from the bottom to the top if g = 9.8 m/s².

2

A heavy uniform rope has a point 5 m above its lower end. Find the pulse speed at that point if g = 10 m/s².

3

A pulse moves in a hanging rope with speed v = √(gx). At what distance from the lower end will the speed be 12 m/s if g = 9 m/s²?

4

The speed of sound in air is 340 m/s at a certain temperature. Using v = 331 + 0.61t, find the temperature t in °C.

60 Questions·
multiple choicemultiple correct

Sample Questions

1multiple choice
3 marks

At 0°C, sound travels at 331 m/s. Estimate the speed at 30°C using v = 331 + 0.61t.

Show answer

349.3 m/s

Substitute t = 30°C in v = 331 + 0.61t. So v = 331 + 0.61 × 30 = 331 + 18.3 = 349.3 m/s.

2multiple choice
3 marks

A sound wave travels through air at 344 m/s. If the speed is proportional to the square root of absolute temperature, and the speed at 0°C is 331 m/s, find the approximate temperature in °C.

Show answer

21 °C

Use v_t = 331(1 + t/(2×273)). So 344 = 331(1 + t/546). Divide by 331: 344/331 ≈ 1.0393. Hence t/546 ≈ 0.0393, so t ≈ 21.5 °C, about 21°C.

3multiple choice
3 marks

The speed of sound in air at 0°C is 331 m/s. Find the speed at 50°C using the approximate formula v = 331 + 0.61t.

Show answer

361.5 m/s

v = 331 + 0.61 × 50 = 331 + 30.5 = 361.5 m/s.

4multiple choice
3 marks

Sound is travelling in air where the wind speed along the direction of sound is 6 m/s and the actual sound speed is 331 m/s. Find the resultant speed of sound along that direction.

Show answer

337 m/s

When wind blows along the direction of sound, speeds add. So resultant speed = 331 + 6 = 337 m/s.

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Frequently Asked Questions

What are the important topics in Wave Motion for ICSE Class 11 Physics?
Key topics in Wave Motion include Mechanical Waves and Basic Ideas, Speed of Wave Motion in Solids, Liquids and Strings, Newton’s Formula and Laplace’s Correction, Variation of Speed of Sound in Air. Study these first, then practise questions on each for Class 11 exams.
How many practice questions are there for Wave Motion?
There are 60 questions on Wave Motion. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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