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.

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

Good luck! 👍

1 / 30

1. Which equation shows the effective value of at latitude considering Earth’s rotation?

2 / 30

2. At a depth equal to half of Earth’s radius, the value of is:

3 / 30

3. Why is it important to understand each term in the gravitational equation?

4 / 30

4. Why are geostationary satellites less useful for military reconnaissance?

5 / 30

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

6 / 30

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

7 / 30

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

8 / 30

8. Which of the following correctly explains why varies with latitude?

9 / 30

9. What is the typical altitude range of a polar satellite?

10 / 30

10. What is the expression for gravitational potential energy of a body of mass at height near Earth’s surface?

11 / 30

11. Which equation explains why objects inside an orbiting satellite experience weightlessness?

12 / 30

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

13 / 30

13. Escape speed is derived by equating which two forms of energy?

14 / 30

14. Which of the following is an advantage of polar satellites over geostationary satellites?

15 / 30

15. Why is the study of gravitation essential for launching artificial satellites?

16 / 30

16. If escape speed from Earth is , what would it be for a planet with twice Earth’s radius and same mass?

17 / 30

17. What is the behavior of gravitational field strength inside a uniform solid sphere?

18 / 30

18. Why can fuel mixing in spacecraft be studied effectively in weightlessness?

19 / 30

19. If a lift falls freely under gravity, passengers inside will experience:

20 / 30

20. The main difference in application between geostationary and polar satellites is:

21 / 30

21. Why do we use the term "point masses" in the derivation of the gravitational law?

22 / 30

22. The universal law of gravitation was first published in which work by Newton?

23 / 30

23. Which of the following best describes the orbital period of polar satellites?

24 / 30

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

25 / 30

25. At the surface of a uniform solid sphere of radius , what is the expression for gravitational field?

26 / 30

26. What is the apparent weight of a person inside a freely falling elevator?

27 / 30

27. When separation , the gravitational potential energy is:

28 / 30

28. Which of the following best explains the negative power of in the dimensional formula of ?

29 / 30

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

30 / 30

30. Which of the following is an application of weightlessness in free-fall experiments on Earth?

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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!

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

Good luck! 👍

1 / 50

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

2 / 50

2. If the density of a sphere doubles and radius doubles, the new self-energy compared to the old is:

3 / 50

3. Why is gravitation important in understanding planetary atmospheres?

4 / 50

4. Galileo’s experiments on falling bodies showed that:

5 / 50

5. Which equation shows how is used to calculate the escape velocity of a satellite from Mars (mass , radius )?

6 / 50

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

7 / 50

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

8 / 50

8. Which of the following is a clear application of weightlessness in astronaut daily life?

9 / 50

9. Which of the following factors does NOT affect the value of on Earth?

10 / 50

10. The orbital velocity of a satellite at a distance from Earth’s center is:

11 / 50

11. If altitude is very small compared to Earth’s radius (), what approximation can be used for ?

12 / 50

12. At the surface of a uniform solid sphere of radius , what is the expression for gravitational field?

13 / 50

13. Gravitational self-energy of Earth is about:

14 / 50

14. Which of the following is a practical application of escape speed in space missions?

15 / 50

15. Why is escape speed on the Moon lower than on Earth?

16 / 50

16. Why is escape speed independent of the mass of the escaping object?

17 / 50

17. Why can’t geostationary satellites be used for polar region studies?

18 / 50

18. Which application of variation is used in mineral and oil exploration?

19 / 50

19. Why is considered the least precisely known of the fundamental physical constants?

20 / 50

20. Why does a diver jumping off a high diving board feel weightless momentarily?

21 / 50

21. The total mechanical energy per unit mass of a satellite in circular orbit is:

22 / 50

22. Which of the following provides the mathematical proof of Kepler’s Third Law?

23 / 50

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

24 / 50

24. Which statement is true regarding above Earth’s surface?

25 / 50

25. What happens to a planet’s orbital speed as it moves from perihelion to aphelion?

26 / 50

26. What happens to escape speed if potential energy is doubled (keeping radius constant)?

27 / 50

27. Why is accurate measurement of significant in physics and engineering?

28 / 50

28. Which modern techniques are used today to improve the measurement of ?

29 / 50

29. Why is the definition of significant in gravitational studies?

30 / 50

30. The path of a satellite around Earth is determined by:

31 / 50

31. Which of the following sectors benefits most from polar satellite data?

32 / 50

32. Which planet takes the longest time to orbit the Sun?

33 / 50

33. For two bodies of mass and , if their separation is reduced to half, gravitational potential energy becomes:

34 / 50

34. In elliptical orbits, how does the kinetic and potential energy of a satellite vary?

35 / 50

35. Which formula directly relates work done by gravitational force to potential energy?

36 / 50

36. Who is often credited with “measuring the mass of the Earth” using the gravitational constant?

37 / 50

37. Why are polar satellites often used in Earth observation missions?

38 / 50

38. What is the dimensionless nature of the gravitational constant ?

39 / 50

39. For Earth, the ratio has what numerical value (approximately)?

40 / 50

40. Which statement correctly describes the work done by gravity when an object falls freely?

41 / 50

41. Why can fuel mixing in spacecraft be studied effectively in weightlessness?

42 / 50

42. If two identical spheres of mass and radius are merged to form one sphere of mass , assuming uniform density, the new self-energy compared to one original sphere is:

43 / 50

43. Which concept by Galileo was crucial for Newton’s first law of motion?

44 / 50

44. What does the symbol stand for in the equation?

45 / 50

45. Which of the following technologies directly depends on understanding gravitation?

46 / 50

46. Kepler’s laws were derived theoretically by Newton using which fundamental law?

47 / 50

47. Why do objects inside the International Space Station appear weightless?

48 / 50

48. In Kepler’s First Law, what is located at the other focus of the elliptical orbit (not occupied by the Sun)?

49 / 50

49. Which of the following is a major application of polar satellites?

50 / 50

50. Kepler’s Third Law of planetary motion states that:

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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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