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

2 / 30

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

3 / 30

3. Why does weightlessness not require gravity to be zero?

4 / 30

4. If the orbital period of a satellite around Earth is known, which physical quantity can be calculated using Kepler’s Third Law?

5 / 30

5. If a satellite of mass is orbiting Earth of mass , its kinetic energy can be expressed as:

6 / 30

6. Who was the first scientist to propose the universal law of gravitation?

7 / 30

7. If force is expressed in dyne, mass in grams, and distance in centimeters, the numerical value of will be:

8 / 30

8. What happens to the gravitational force between two bodies if the value of were larger than its actual value?

9 / 30

9. Why does the centrifugal force reduce the effective value of ?

10 / 30

10. Why is called “universal”?

11 / 30

11. How is used to calculate the orbital velocity of a satellite around Earth?

12 / 30

12. In a simple pendulum experiment, if length is doubled, how does the calculated value of change?

13 / 30

13. How is involved in calculating the gravitational potential at a point?

14 / 30

14. Why is the gravitational potential energy of an orbiting satellite negative?

15 / 30

15. How does the variation of above Earth’s surface differ from that below the surface?

16 / 30

16. What is the fundamental significance of the gravitational constant in physics?

17 / 30

17. If a satellite of mass moves from an orbit of radius to , the change in energy is:

18 / 30

18. What is the dimensional formula of ?

19 / 30

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

20 / 30

20. Which orbital condition ensures astronauts experience weightlessness?

21 / 30

21. Which expression represents the gravitational field due to a point mass at a distance ?

22 / 30

22. At Earth’s center, what is the value of ?

23 / 30

23. Why is gravitational potential always negative?

24 / 30

24. Why do all bodies fall at the same rate in the absence of air resistance?

25 / 30

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

26 / 30

26. What is the approximate numerical value of in SI units?

27 / 30

27. In Kepler’s Third Law, if is measured in years and in AU, then the proportionality constant for planets around the Sun is:

28 / 30

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

29 / 30

29. Which of the following forces is responsible for the energy exchange between kinetic and potential energy in elliptical orbits?

30 / 30

30. Which Kepler’s law is essential for predicting the varying speed of comets in their orbits?

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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. Why are polar satellites preferred for mapping and cartography?

2 / 50

2. In the formula, what does represent?

3 / 50

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

4 / 50

4. In CGS units, what is the unit of ?

5 / 50

5. Which satellite helps in Earth resource management such as agriculture and forestry?

6 / 50

6. The gravitational pull of the Moon is mainly responsible for:

7 / 50

7. How does gravitational self-energy scale with mass and radius ?

8 / 50

8. Which experiment is commonly used to measure the value of near Earth’s surface?

9 / 50

9. If the gravitational potential energy of a system is , what does it indicate?

10 / 50

10. Why is the study of gravitation important in astronomy?

11 / 50

11. What was the historical significance of Cavendish’s experiment beyond finding ?

12 / 50

12. Why is gravitation important in understanding planetary atmospheres?

13 / 50

13. The expression for the binding energy of a satellite of mass in circular orbit of radius around Earth of mass is:

14 / 50

14. If Sun collapses into a neutron star with radius shrinking by factor of while mass remains the same, its self-energy changes by:

15 / 50

15. Why are geostationary satellites suitable for weather forecasting?

16 / 50

16. Why is the gravitational potential energy of an orbiting satellite negative?

17 / 50

17. If altitude of a satellite increases, its orbital period:

18 / 50

18. Who first experimentally determined the value of the gravitational constant ?

19 / 50

19. Which application of weightlessness is directly used in protein crystal growth research?

20 / 50

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

21 / 50

21. What is the total energy of a satellite in circular orbit?

22 / 50

22. If the distance between two masses is doubled, how does gravitational potential energy change?

23 / 50

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

24 / 50

24. How does escape speed relate to orbital speed at the same radius?

25 / 50

25. Why do astronauts inside the International Space Station (ISS) feel weightless?

26 / 50

26. What is the escape speed from the Moon’s surface? (Moon’s mass , radius )

27 / 50

27. What is the SI unit of the gravitational constant ?

28 / 50

28. Geostationary satellites are primarily used for:

29 / 50

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

30 / 50

30. Why don’t satellites fall back to Earth?

31 / 50

31. What type of experiment could directly demonstrate the variation of with latitude?

32 / 50

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

33 / 50

33. How did Newton use universal gravitation to explain Kepler’s laws?

34 / 50

34. At depth , what is the value of ?

35 / 50

35. Kepler’s First Law of planetary motion states that:

36 / 50

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

37 / 50

37. Why is gravitational self-energy important in astrophysics?

38 / 50

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

39 / 50

39. The ratio of self-energy of Earth to that of Moon is approximately (take , ):

40 / 50

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

41 / 50

41. Which of the following is an example of a navigation satellite?

42 / 50

42. The kinetic energy of a satellite depends on:

43 / 50

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

44 / 50

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

45 / 50

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

46 / 50

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

47 / 50

47. If a ball of mass falls from a height of , how much work is done by gravity? ()

48 / 50

48. Which method can be used to measure small variations of at different locations on Earth?

49 / 50

49. If a star loses half of its radius but keeps its mass constant, the released gravitational energy is:

50 / 50

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

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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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