This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 30 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Planets revolve around the sun in an elliptical orbits with the sun at one focus is ..... A) Kepler's 2nd law. B) Gravitational law. C) Newton's 3rd law of motion. D) Kepler's 1st law. Show Answer Correct Answer: D) Kepler's 1st law. 2. Newton did not discover gravity, for early humans discovered it whenever they fell. What Newton did discover is that gravity A) Tells us about why the universe expands. B) Tells us how to discover new planets. C) Accounts for the existence of black holes. D) Extends throughout the universe. Show Answer Correct Answer: D) Extends throughout the universe. 3. Neutrons were discovered by ..... A) JAMES CHASDWICK. B) RUTHER FORD. C) DALTON. D) BOHRS. Show Answer Correct Answer: A) JAMES CHASDWICK. 4. Consider the Earth to be a homogenous sphere. Scientist A goes deep down in a mine and scientist B goes high up ina balloon. The gravitational field measured by A) A goes on decreasing and that by B goes on increasing. B) B goes on decreasing and that by A goes on increasing. C) Each remain unchanged. D) Each goes on decreasing. Show Answer Correct Answer: D) Each goes on decreasing. 5. In a physics class, Ramana asked his teacher, 'If a ball is thrown up, what will be the value of g?' What would be the teacher's correct response? A) Zero. B) Negative. C) Positive. D) Negligible. Show Answer Correct Answer: C) Positive. 6. What happens to the gravitational force between two objects if the mass of one object is halved, but the distance remains the same? A) Halves. B) Doubles. C) Remains the same. D) Becomes four times smaller. Show Answer Correct Answer: A) Halves. 7. From Kepler's third law, a hypothetical planet that is twice as far from the Sun as Earth should have a period of A) 0.5 Earth years. B) 1 Earth year. C) 2 Earth years. D) More than 2 Earth years. E) It depends on the planet's mass. Show Answer Correct Answer: D) More than 2 Earth years. 8. What will be the weight of an object on the moon if its mass is 15kg? A) 23kg. B) 24.5N$^\circ$. C) 147N$^\circ$. D) 131N$^\circ$. Show Answer Correct Answer: B) 24.5N$^\circ$. 9. The units of acceleration are A) Kg. B) M/s2. C) M/s. D) N. Show Answer Correct Answer: B) M/s2. 10. Gravitational potential at any point inside the solid sphere is ..... A) $\frac{GM}{2R^3}\left(3R^2-r^2\right)$. B) $-\frac{GM}{2R^3}\left(3R^2-r^2\right)$. C) $-\frac{GM}{3R^3}\left(2R^2-r^2\right)$. D) $-\frac{GM}{3R^3}\left(3R^2-r^2\right)$. Show Answer Correct Answer: B) $-\frac{GM}{2R^3}\left(3R^2-r^2\right)$. 11. Mass and Gravitational Force are ..... proportional. A) Directly. B) Inversely. C) Not. D) None of the above. Show Answer Correct Answer: A) Directly. 12. Which of the following best describes the concept of gravitational field strength? A) The force experienced by a unit mass at a point in space. B) The distance between two masses. C) The velocity of an object in free fall. D) The energy required to move a mass in a gravitational field. Show Answer Correct Answer: A) The force experienced by a unit mass at a point in space. 13. A body is raised to a height 'nR' from the surface of the earth of radius r .The ratio of acceleration due to gravity on the surface of the earth to that at the given altitude is A) (n+1)$^{-2}$. B) (n+1)$^{2}$. C) (n+1). D) (n+1)$^{-3}$. Show Answer Correct Answer: B) (n+1)$^{2}$. 14. The formula for Density is A) Mass/Length. B) Mass/Volume. C) Volume/Mass. D) 2(Density-1gram/cm3). Show Answer Correct Answer: B) Mass/Volume. 15. When driving with your friends and the car turns right, what causes you and the other passengers to move to the left? A) Inertia. B) Centripetal Force. C) Centrifugal Force. D) Gravity. Show Answer Correct Answer: A) Inertia. 16. The earth attracts a body of mass 2kg on its surface with a force of A) 9.8N. B) 19.6N. C) $6.67\times10^{-11^{ }}N$. D) $2\times6.67\times10^{-11}N$. Show Answer Correct Answer: B) 19.6N. 17. What is the key takeaway from the lesson on gravitation? A) The speed of light in a vacuum. B) The role of air resistance in falling objects. C) The differences between mass and weight. D) The color of different planets. Show Answer Correct Answer: C) The differences between mass and weight. 18. Which of the following statements is true about free fall? A) The object falls with constant velocity. B) The object falls with constant acceleration. C) The object's mass affects its rate of fall. D) The object falls without the influence of gravity. Show Answer Correct Answer: B) The object falls with constant acceleration. 19. Determine how the gravitational force would change if the distance was tripled. (Hint:use laws of one) A) The force would triple. B) The force would increase by a factor of 9. C) The force would decrease by a factor of 1/9. D) The force would stay constant. Show Answer Correct Answer: C) The force would decrease by a factor of 1/9. 20. GRAVITATIONAL MASS OF A BODY IS PROPOTIONAL TO THE GRAVITATIONAL OF WHAT? A) FIELD. B) INTENSITY. C) FORCE. D) ALL THE ABOVE. Show Answer Correct Answer: D) ALL THE ABOVE. 21. According to Kepler's 3rd law, the square of the time it takes for an object to orbit, T, is directly related to the cube of the distance, r, between the object and what it is orbiting. What this means is that if a satellite moves away from what it is orbiting, A) The larger the constant k is. B) The smaller the constant k is. C) The longer the orbital period is. D) The shorter the orbital period is. Show Answer Correct Answer: C) The longer the orbital period is. 22. Newtton's Law of Gravitation states a mangnitude of an attractive force between two point masses is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.what is it related to? A) Newton's 1st Law of motion. B) Newton's 2nd Law of motion. C) Newton's 3rd Law of motion. D) None of the above. Show Answer Correct Answer: C) Newton's 3rd Law of motion. 23. When is the pressure exerted said to be one pascal? A) When a force of one pound is applied to an area of one square inch. B) When a force of one kilogram is applied to an area of one square meter. C) When a force of one newton is applied to an area of one square meter. D) When a force of one joule is applied to an area of one square centimeter. Show Answer Correct Answer: C) When a force of one newton is applied to an area of one square meter. 24. Value of atmospheric pressure in pascal is? A) 5 x 10$^{5}$. B) 2.013 x 10$^{5}$. C) 1.13 x 10$^{5}$. D) 5.013 x 10$^{5}$. Show Answer Correct Answer: C) 1.13 x 10$^{5}$. 25. A planet and a moon have a gravity force between them of Fg. If the planet was 3x more massive and they were moved 3x further apart. How much gravity force would there be between them? A) 3 Fg. B) 1/3 Fg. C) 9 Fg. D) 1/9 Fg. E) 1/27 Fg. Show Answer Correct Answer: B) 1/3 Fg. ← PreviousNext →Related QuizzesClass 11 Physics (Part I) Chapter 6 Gravitation Quiz 1Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 2Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 3Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 4Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 5Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 6Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 7Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 8Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 9Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books