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Class 11 Physics — Chapter 8: Gravitation Online Test

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Class 11 Physics: Gravitation 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

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1 / 20

1. The gravitational self-energy of a uniform sphere of density and radius is:

2 / 20

2. If Earth’s radius is , what is the orbital radius of a geostationary satellite?

3 / 20

3. Why is gravitational potential always negative?

4 / 20

4. Inside a spherical shell of uniform mass distribution, the gravitational field is:

5 / 20

5. How does weightlessness assist in medical research in space?

6 / 20

6. When will a passenger in a lift feel weightless?

7 / 20

7. Which communication benefit is specific to geostationary satellites compared to low Earth orbit satellites?

8 / 20

8. What is the total mechanical energy of a satellite in terms of its potential energy ?

9 / 20

9. If the gravitational constant were larger, how would it affect the potential energy of a satellite?

10 / 20

10. What is the expression for the kinetic energy of a satellite in circular orbit of radius ?

11 / 20

11. Which force is responsible for holding galaxies together?

12 / 20

12. If the semi-major axis of a planet’s orbit is doubled, its orbital period will:

13 / 20

13. Which mathematical relation combines Newton’s Law of Gravitation with Kepler’s Third Law?

14 / 20

14. Which application of Kepler’s laws helps in predicting eclipses and transits?

15 / 20

15. In the formula , what does represent?

16 / 20

16. Why is the inverse-square law form essential in the gravitational formula?

17 / 20

17. Why is called “universal”?

18 / 20

18. Why is called a universal constant?

19 / 20

19. What is the gravitational constant commonly known as?

20 / 20

20. Why was Cavendish’s experiment considered groundbreaking?

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Class 11 Physics: Gravitation 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. If the orbital speed of a satellite close to Earth’s surface is about 7.9 km/s, what will be the escape speed from Earth?

2 / 30

2. Which principle is applied in deriving the expression for below Earth’s surface?

3 / 30

3. Which factor directly affects the magnitude of potential energy of an orbiting satellite?

4 / 30

4. What is the order of magnitude of the gravitational force Cavendish measured between the lead spheres?

5 / 30

5. Why are low Earth orbit satellites preferred for remote sensing?

6 / 30

6. Which astronomer’s precise observations of planetary motion allowed Kepler to formulate his laws?

7 / 30

7. Why do rockets require such high energy to leave Earth?

8 / 30

8. Which of the following is a direct observational consequence of Kepler’s Second Law?

9 / 30

9. Who gave the three laws of planetary motion that later helped Newton to formulate the law of gravitation?

10 / 30

10. At what approximate altitude does reduce to 75% of its surface value?

11 / 30

11. What is the general expression for the gravitational self-energy of a uniform solid sphere of mass and radius ?

12 / 30

12. Why is called a universal constant?

13 / 30

13. When will a passenger in a lift feel weightless?

14 / 30

14. Which geological factor can cause local variations in ?

15 / 30

15. Which formula is used to calculate using a simple pendulum of length and time period ?

16 / 30

16. In which of the following situations will a person experience weightlessness?

17 / 30

17. If altitude , what approximate formula can be used for ?

18 / 30

18. Kepler’s Second Law can be derived from which principle of physics?

19 / 30

19. Which equation involving is used to calculate the mass of Earth?

20 / 30

20. What is the main limitation of using a simple pendulum for measuring ?

21 / 30

21. If the mass of one object is doubled while keeping distance constant, how does the force change?

22 / 30

22. If an astronaut orbits at 400 km above Earth’s surface (Earth’s radius ), what fraction of does he experience?

23 / 30

23. Which application of Kepler’s laws helps in predicting eclipses and transits?

24 / 30

24. How is the gravitational potential energy between two masses expressed using ?

25 / 30

25. How often can a polar satellite pass over the same region on Earth?

26 / 30

26. What is the gravitational potential energy of a satellite at a distance of from Earth’s center (Earth’s mass )? ()

27 / 30

27. What is the defining characteristic of a polar satellite?

28 / 30

28. If the potential at Earth’s surface is , then the work done in bringing a unit mass from infinity to Earth’s surface is:

29 / 30

29. Which of the following is an application of weightlessness in space exploration?

30 / 30

30. Which of the following planets experiences the greatest variation in orbital speed due to Kepler’s Second Law?

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Class 11 Physics: Gravitation 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. Which geological factor can cause local variations in ?

2 / 50

2. If the inclination of a satellite is not zero, the satellite will:

3 / 50

3. Why is (square of the distance) used instead of just ?

4 / 50

4. Which factor contributes more significantly to the variation of with latitude?

5 / 50

5. If escape speed from Earth is , what will be the escape speed from a planet of same radius but 9 times Earth’s mass?

6 / 50

6. What is the dimensional formula of the gravitational constant ?

7 / 50

7. What is the semi-major axis of an elliptical orbit?

8 / 50

8. Why do astronauts need to secure liquids in sealed containers during weightlessness?

9 / 50

9. If the semi-major axis of a planet’s orbit is doubled, its orbital period will:

10 / 50

10. Why can a skydiver experience near weightlessness during free fall?

11 / 50

11. If the radius of a planet doubles while its mass remains constant, what happens to escape speed?

12 / 50

12. Which of the following is an artificial satellite?

13 / 50

13. Why does a pendulum clock gain or lose time when moved from equator to poles?

14 / 50

14. Which is a significant advantage of polar satellites in global weather models?

15 / 50

15. At what approximate altitude does become half of its surface value? (Take ).

16 / 50

16. Which of the following dimensional checks confirms the correctness of Newton’s gravitational formula?

17 / 50

17. Which of the following ratios is constant for all planets according to Kepler’s Third Law?

18 / 50

18. Why are geostationary satellites suitable for weather forecasting?

19 / 50

19. How often can a polar satellite pass over the same region on Earth?

20 / 50

20. What is the connection between escape speed and black holes?

21 / 50

21. Why is the expression more general than ?

22 / 50

22. What is the altitude of a geostationary satellite approximately?

23 / 50

23. If the value of at Earth’s surface is , what will it be at a height equal to Earth’s radius ()?

24 / 50

24. What physical principle allowed Cavendish to measure such a tiny force in his experiment?

25 / 50

25. If two bodies each of mass are separated by , what is their gravitational potential energy?

26 / 50

26. Why can hot hydrogen escape from Earth’s upper atmosphere while oxygen and nitrogen remain bound?

27 / 50

27. Which principle ensures that the total mechanical energy of a satellite in orbit remains constant?

28 / 50

28. What is the gravitational potential energy of a satellite at a distance of from Earth’s center (Earth’s mass )? ()

29 / 50

29. When an object is brought closer to Earth from infinity, the work done by gravity is:

30 / 50

30. Why is considered a link between terrestrial gravity and cosmic phenomena?

31 / 50

31. At what approximate altitude above Earth’s surface are geostationary satellites placed?

32 / 50

32. Why is weightlessness useful for studying fluid behavior in space?

33 / 50

33. Which mathematical relation combines Newton’s Law of Gravitation with Kepler’s Third Law?

34 / 50

34. Which of the following equations correctly represents the universal law of gravitation?

35 / 50

35. If the potential at a distance from a mass is , then the corresponding field is:

36 / 50

36. If Earth stopped rotating, what would happen to the value of at the equator?

37 / 50

37. What is the definition of gravitational potential at a point?

38 / 50

38. In which of the following situations will a person experience weightlessness?

39 / 50

39. Which of the following best describes potential due to a spherical shell at a point outside the shell?

40 / 50

40. What is the definition of escape speed from a planet’s surface?

41 / 50

41. Why do geostationary satellites have limited coverage of Earth?

42 / 50

42. The gravitational self-energy of a star of mass and radius (Sun approx.) is:

43 / 50

43. The ratio of kinetic energy to gravitational potential energy of a satellite in orbit is:

44 / 50

44. Which formula gives the value of at a depth below Earth’s surface (assuming uniform density)?

45 / 50

45. Which ancient philosopher first suggested that every object has a natural place and tends to move toward it?

46 / 50

46. Which condition best explains why astronauts feel weightless in a spacecraft orbiting Earth?

47 / 50

47. Which condition must be satisfied for a satellite to escape Earth’s gravitational field completely?

48 / 50

48. What is the approximate escape speed from Earth’s surface?

49 / 50

49. What is the relationship between work done by gravity and change in gravitational potential energy?

50 / 50

50. Which expression is used to calculate the escape speed from the surface of a planet of mass and radius ?

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Practice Gravitation MCQs
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Class 11 Physics — Chapter 8: Gravitation Online Test

The Gravitation Online Test for Class 11 Physics helps you understand one of the most interesting yet conceptually challenging topics — the force that binds the universe together. Many students learn Newton’s Law of Gravitation but often face confusion when solving numerical problems on gravitational force, field, potential, and acceleration due to gravity. This chapter-wise online test is designed to remove that fear through focused MCQ practice and real exam-style questions based on the NCERT Class 11 Physics Chapter 8 — Gravitation.

This test series is suitable for CBSE Class 11 students as well as JEE / NEET aspirants who want to master concepts like universal law of gravitation, satellite motion, escape velocity, and variation of g. Each paper is auto-graded, time-bound, and gives instant feedback along with an answer review after submission. It’s not just about marks — it’s about developing clarity, logic, and accuracy while dealing with gravitational concepts.

Attempting these Gravitation MCQ online tests will help you improve conceptual understanding, accuracy, and time management skills. Every question is crafted from important topics like Kepler’s laws of planetary motion, gravitational potential energy, and acceleration due to gravity at different heights and depths. Once you start solving, you’ll realize how simple the concepts become when applied repeatedly.

About this Online Test

The Gravitation Chapter Test includes three papers that increase in difficulty and are designed for both concept-building and exam-level readiness:

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

Each test paper includes questions based on universal law of gravitation, mass and weight, gravitational potential energy, motion of satellites, escape velocity and more. Papers 2 and 3 shuffle new questions each time you attempt, giving you a fresh and dynamic practice experience.

Key Topics Covered (Gravitation)

  • Newton’s Law of Gravitation and its applications
  • Gravitational constant (G) and its measurement
  • Acceleration due to gravity (g) and its variation with height, depth, and latitude
  • Kepler’s laws of planetary motion
  • Gravitational field and potential
  • Escape velocity and orbital velocity
  • Motion of artificial satellites
  • Energy of satellite in circular orbit

How This Gravitation Test Helps You

Many students find numerical problems in Gravitation tricky due to formula confusion. This online test helps you overcome that by providing repeated exposure to problem patterns that actually appear in exams. It’s ideal for quick revision, concept checking, and confidence building before your school tests or JEE/NEET entrance exams.

  • Strengthens formula-based and conceptual problem solving
  • Provides step-by-step learning through three progressive papers
  • Shows instant results, percentage score, and correct answers
  • Free to access anytime without login or registration

Who Should Take This Test

  • Class 11 CBSE/NCERT students preparing for chapter-wise Physics exams
  • JEE and NEET aspirants targeting high-scoring Physics sections
  • Students wanting to revise gravitation formulas and concepts
  • Teachers who want ready-to-use timed chapter quizzes for their students

Preparation Tips for Chapter 8 — Gravitation

  • Revise Newton’s Law of Gravitation and understand how the force acts between any two masses.
  • Practice numerical problems on acceleration due to gravity (g) at height and depth.
  • Study Kepler’s laws carefully — they form the base for satellite motion.
  • Attempt Paper 1 for formula recall, Paper 2 for accuracy, and Paper 3 for full-speed practice.
  • Don’t rush — focus on understanding the concept behind every question.

Before You Start

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

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