Class 11 Physics — Chapter 15: Waves Online Test

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Class 11 Physics: Waves Online Test (Paper 1)

Welcome to Paper 1! This is your foundation to build confidence and get you ready to tackle the challenges ahead.

  • Total Questions: 20
  • Time Allotted: 30 minutes
  • Passing Score: 40%
  • Randomization: No
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 20

1. A wave packet has a central wavelength and wave speed . Find the central frequency.

2 / 20

2. A diffraction grating gives first-order maximum at angle for light of wavelength 600 nm. Find grating spacing .

3 / 20

3. A closed organ pipe of length resonates with sound speed . What are first three harmonics?

4 / 20

4. In the case of a point source emitting waves, the wavefronts are:

5 / 20

5. Why is polarization important in LCD technology?

6 / 20

6. A wave has frequency and wavelength . What is its speed?

7 / 20

7. A wave strikes a barrier at incidence. What is the reflection angle?

8 / 20

8. A tuning fork of 512 Hz produces 6 beats per second with another fork. What are the possible frequencies of the second fork?

9 / 20

9. A string wave has speed and frequency . Find its wavelength.

10 / 20

10. A sound wave in water has speed and frequency . Find its wavelength.

11 / 20

11. A longitudinal wave is produced in a medium with density , speed , displacement amplitude , and angular frequency . Find the pressure amplitude.

12 / 20

12. A progressive wave is expressed as . Find its speed.

13 / 20

13. In a steel rod, Young’s modulus is , and density is . Find speed of longitudinal waves.

14 / 20

14. An aluminum rod has density and Young’s modulus . Find wave speed.

15 / 20

15. An electromagnetic wave has frequency . What is its wavelength in vacuum?

16 / 20

16. A string wave is given by . What is its frequency?

17 / 20

17. In spatial dispersion, what determines the angular separation of different colors in a prism?

18 / 20

18. A rectangular waveguide has dimensions . Find cutoff frequency of dominant mode TE (take ).

19 / 20

19. For a rectangular waveguide of dimensions , compute cutoff frequency of TE mode.

20 / 20

20. A plane-polarized light of intensity passes through an analyzer at to the plane of polarization. Find transmitted intensity.

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Class 11 Physics: Waves Online Test (Paper 2)

Welcome to Paper 2! You’ve mastered the basics, and now it’s time to test your understanding with a more challenging set of questions.

Get new questions on each attempt

  • Total Questions: 30
  • Time Allotted: 45 minutes
  • Passing Score: 50%
  • Randomization: Yes
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 30

1. The time between successive beats is called:

2 / 30

2. A sound wave in water has speed and frequency . Find its wavelength.

3 / 30

3. A wave has two perpendicular components of equal amplitude, but one lags behind the other by . What type of polarization results?

4 / 30

4. What is dispersion of waves?

5 / 30

5. A copper rod has Young’s modulus and density . Find speed of longitudinal waves.

6 / 30

6. A ray of light strikes a plane mirror at an angle of with the mirror surface. Find the angle of reflection.

7 / 30

7. A microwave has frequency . Find its wavelength in vacuum.

8 / 30

8. A concave mirror produces which type of wavefront when a parallel beam is incident on it?

9 / 30

9. What determines the color of light or the pitch of sound in terms of wave characteristics?

10 / 30

10. In Newton’s rings experiment, a dark spot at the center is observed because:

11 / 30

11. Why cannot transverse mechanical waves propagate in gases?

12 / 30

12. The speed of sound in water is about:

13 / 30

13. The general solution of the wave equation is written as:

14 / 30

14. Why are rays often used instead of wavefronts in geometrical optics?

15 / 30

15. Astronomers use Doppler effect to measure which property of stars and galaxies?

16 / 30

16. If the wavelength of a sound wave in air is and the speed of sound is , what is its frequency?

17 / 30

17. Which application uses X-ray diffraction?

18 / 30

18. A stretched string obeys the wave equation. If displacement is given by , what relation must hold between , , and ?

19 / 30

19. The speed of sound in a medium is given by which formula?

20 / 30

20. What does “mode” in a waveguide refer to?

21 / 30

21. Which mathematical form represents the one-dimensional wave equation?

22 / 30

22. In a longitudinal wave, how do the particles of the medium oscillate relative to the direction of wave propagation?

23 / 30

23. A light wave has frequency . Find its wavelength in vacuum.

24 / 30

24. In a steel rod, Young’s modulus is , and density is . Find speed of longitudinal waves.

25 / 30

25. When a transverse wave pulse on a string is reflected at a fixed end, what happens to the reflected pulse?

26 / 30

26. Doppler weather radar helps meteorologists by:

27 / 30

27. In a plane wave, what is the relation between rays and wavefronts?

28 / 30

28. In which medium is the speed of sound least?

29 / 30

29. A string of length , mass , is under tension of . Find the fundamental frequency.

30 / 30

30. A sound wave has speed and wavelength . Find its frequency.

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Class 11 Physics: Waves Online Test (Paper 3)

Welcome to Paper 3! You’ve warmed up—now it's time to step up your game and conquer the challenge with tougher questions!

Earn a certificate upon passing

Get new questions with every attempt

  • Total Questions: 50
  • Time Allotted: 75 minutes
  • Passing Score: 70%
  • Randomization: Yes
  • Certificate: Yes
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 50

1. A rectangular waveguide has dimensions . Find cutoff frequency of dominant mode TE (take ).

2 / 50

2. Why cannot transverse mechanical waves propagate in gases?

3 / 50

3. If two waves of equal amplitude overlap destructively, what happens to intensity?

4 / 50

4. What type of wave is a sound wave in air?

5 / 50

5. Why are rays often used instead of wavefronts in geometrical optics?

6 / 50

6. The mathematical expression of superposition principle is:

7 / 50

7. In acoustics, the design of concert halls ensures:

8 / 50

8. In fiber-optic communication, which form of dispersion causes pulse broadening due to wavelength dependence of refractive index?

9 / 50

9. A source emits sound at . An observer moves towards the source at . Speed of sound = . Find observed frequency.

10 / 50

10. Two waves with amplitudes 6 cm and 8 cm interfere destructively. What is the minimum possible resultant amplitude?

11 / 50

11. Which function is NOT a valid solution of the wave equation?

12 / 50

12. A microwave has wavelength . What is its frequency in vacuum?

13 / 50

13. Which architectural design uses sound reflection to enhance audibility in large halls?

14 / 50

14. A wave has wavelength and speed . Find its frequency.

15 / 50

15. What is the general solution to the wave equation in one dimension?

16 / 50

16. When white light enters a glass prism, which color bends the least?

17 / 50

17. An open pipe resonates at fundamental frequency of 170 Hz. If speed of sound = 340 m/s, what is pipe length?

18 / 50

18. Which property of the medium allows transverse waves to exist?

19 / 50

19. Which property is common to both mechanical and electromagnetic waves?

20 / 50

20. If the frequency of a wave is doubled but speed remains constant, what happens to its wavelength?

21 / 50

21. In the wave equation, the term represents:

22 / 50

22. A wavefront strikes a barrier at an angle of with the normal. What is the reflected angle?

23 / 50

23. Why does violet light deviate more than red light in a prism?

24 / 50

24. A concave mirror produces which type of wavefront when a parallel beam is incident on it?

25 / 50

25. A copper rod has Young’s modulus and density . Find speed of longitudinal waves.

26 / 50

26. A string of length has mass . If tension is , find wave speed.

27 / 50

27. In Young’s double-slit experiment (YDS), bright fringes appear because of:

28 / 50

28. In a transverse wave, how do the particles of the medium move relative to the direction of wave propagation?

29 / 50

29. Which of the following is NOT a fundamental characteristic of a wave?

30 / 50

30. In a stethoscope, reflection of sound helps in:

31 / 50

31. In glass, refractive index for violet = 1.54 and for red = 1.50. If speed of light in vacuum = , find speed of red and violet inside glass.

32 / 50

32. A circular waveguide of radius operates in TE mode. Calculate cutoff wavelength (use ).

33 / 50

33. A dispersive medium has . Find group velocity.

34 / 50

34. Which of the following is true for circular polarization?

35 / 50

35. A rectangular waveguide has . Calculate cutoff frequency of TE mode (take ).

36 / 50

36. A pulse has . Estimate spatial width .

37 / 50

37. A sound wave strikes a wall making an angle of with the normal. What is the angle of reflection?

38 / 50

38. Which optical device uses polarization to reduce glare from surfaces like water and glass?

39 / 50

39. In circular waveguides, which mode is typically dominant?

40 / 50

40. A traffic radar operates at . The measured Doppler shift from a car is . Find the car’s speed (use ).

41 / 50

41. A plane wave strikes a flat surface at incidence. If law of reflection holds, what is the reflected angle?

42 / 50

42. Why are polarizers used in cameras and sunglasses?

43 / 50

43. A sonometer wire of length has tension and linear density . Find its fundamental frequency.

44 / 50

44. Which condition is true for pressure variations at the closed end of an organ pipe?

45 / 50

45. Why does dispersion occur in optical media like glass or water?

46 / 50

46. For a wave: , . Find the type of polarization.

47 / 50

47. A sound wave in air has an amplitude of . What does this physically represent?

48 / 50

48. Why does sound travel faster in solids than in liquids and gases?

49 / 50

49. Which of the following devices uses waveguides in microwave engineering?

50 / 50

50. The phase velocity of a wave is defined as:

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Class 11 Physics — Chapter 15: Waves Online Test

The Waves Online Test for Class 11 Physics helps students understand one of the most fascinating and high-scoring chapters in mechanics — the study of wave motion. Waves are everywhere: in sound, light, and even earthquakes. This chapter teaches how energy travels without transferring matter, and this MCQ-based online test ensures you grasp these core ideas through practical, exam-style questions.

The test is based on the NCERT Class 11 Physics Chapter 15 — Waves and follows the latest CBSE pattern. It includes multiple-choice questions from every key topic such as transverse and longitudinal waves, speed of sound, Doppler effect, superposition, beats, and stationary waves. Each paper is auto-evaluated and provides instant results with answer review, helping you analyze your performance and strengthen weak areas.

The Waves Online Test helps you connect classroom theory with real-world applications like the production of sound, resonance in musical instruments, and Doppler effect in astronomy. Each question is created to improve your understanding of formulas and physical interpretation. After each attempt, you can review your score, correct answers, and retake the paper for better performance.

About this Online Test

The Chapter 15 — Waves Online Test consists of three difficulty-based papers. Each paper tests your conceptual depth and numerical accuracy progressively.

  • Paper 1 — Concept Foundation: 20 questions · 30 min · Pass ≥ 40%
  • Paper 2 — Mixed Practice: 30 questions · 45 min · Pass ≥ 50% · Random new questions each attempt
  • Paper 3 — Advanced Challenge: 50 questions · 75 min · Pass ≥ 70% · Certificate available on passing

Papers 2 and 3 refresh with new question sets every time you retake them, while Paper 1 remains fixed for concept review. All tests include automatic grading, time tracking, and complete answer explanations after submission.

Key Topics Covered (Waves)

  • Introduction to wave motion
  • Transverse and longitudinal waves
  • Displacement, amplitude, frequency, and wavelength
  • Speed of wave on a stretched string
  • Principle of superposition of waves
  • Beats and interference
  • Stationary (standing) waves
  • Resonance and natural frequency
  • Doppler effect and its real-life applications

Why You Should Take This Test

Waves is one of the most conceptually rich and formula-based chapters. This online test helps you practice a variety of questions that reinforce your theoretical and mathematical understanding. It helps you:

  • Revise all formulas related to wave speed, frequency, and wavelength
  • Understand wave superposition and resonance clearly
  • Improve accuracy with conceptual and numerical MCQs
  • Get instant score and answer analysis after submission
  • Boost your confidence for both board exams and JEE/NEET Physics

Who Should Attempt This Test

  • CBSE/NCERT Class 11 students preparing for Physics exams
  • JEE and NEET aspirants aiming to master mechanics and sound wave topics
  • Students wanting conceptual clarity in standing waves and Doppler effect
  • Teachers looking for ready-to-use online MCQ tests for practice

Preparation Tips for Chapter 15 — Waves

  • Revise the wave equation and understand how displacement varies with time and position.
  • Memorize key relations: v = fλ and v = √(T/μ) for waves on a string.
  • Practice numericals on beats, stationary waves, and Doppler shift.
  • Study the phase difference and nodes–antinodes formation clearly.
  • Attempt Paper 1 for formula check, Paper 2 for mixed concepts, and Paper 3 for full exam simulation.

Before You Start

  • Use updated Chrome or Edge browser for a smooth test experience.
  • Ensure a stable internet connection during the test.
  • Do not refresh or close the browser tab while attempting.

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