This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 33 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Newton's Universal Law of Gravitation explained about ..... A) Gravitational force. B) Magnetic force. C) Centripetal force. D) None of the above. Show Answer Correct Answer: A) Gravitational force. 2. Kepler's first law says that the planets move around the Sun in an ellipse with the Sun at one focus. What is at the other focus? A) Empty space. B) The Earth. C) The Moon. D) Your teacher. E) The planet being considered. Show Answer Correct Answer: A) Empty space. 3. As distance between two objects increase the pull of gravity A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: B) Decreases. 4. What keeps planets in orbit according to Newton? A) Tension force. B) Gravitational force. C) Frictional force. D) Magnetic force. Show Answer Correct Answer: B) Gravitational force. 5. Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m. A) 10 N. B) 20 N. C) 30 N. D) 40 N. Show Answer Correct Answer: D) 40 N. 6. The larger the mass of an object ..... A) The smaller the force of gravity. B) The larger the force of gravity. C) Mass has no effect on the amount of gravity an object experiences. D) None of the above. Show Answer Correct Answer: B) The larger the force of gravity. 7. Which of the following statements about Rutherford's model of atom are correct?(i) Considered the nucleus as positively charged.(ii) Established that the a-particles are four times as heavy as a hydrogen atom.(iii) Can be compared to solar system.(iv) Was in agreement with Thomson's model. A) (i) and (iii). B) (ii) and (iii). C) (i) and (iv). D) Only (i). Show Answer Correct Answer: A) (i) and (iii). 8. A stone is dropped from rest. How long does it take to reach a speed of 30 m/s?(Assume g=10 m/s2) A) 1.5 s. B) 2 s. C) 3 s. D) 4 s. Show Answer Correct Answer: C) 3 s. 9. The orbital velocity of a satellite close to the Earth depends on: A) The mass of the satellite. B) The radius of the orbit. C) The mass of the Earth. D) Both B and C. Show Answer Correct Answer: D) Both B and C. 10. Gravity is the phenomenon between A) Earth and moon. B) Earth and you. C) Earth and any object. D) None. Show Answer Correct Answer: C) Earth and any object. 11. According to Kepler's first law, the paths of the planets are circular in shape. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 12. A solid exerts pressure of 20 Pa on a surface of 2m$^{2}$ . Find its weight. A) 30 N. B) 50 N. C) 40 N. D) 80 N. Show Answer Correct Answer: C) 40 N. 13. Does the earth attract the moon with a force that is greater, smaller, or the same as the force with which the moon attracts the earth? A) Greater. B) Smaller. C) The same. D) Depends on the distance between the earth and the moon. Show Answer Correct Answer: C) The same. 14. If the radius of the earth were to shrink by 1% its mass remaining the same, the acceleration due to gravity on the earth's surface would: A) Decrease by 2%. B) Remain unchanged. C) Increase by 2%. D) Increase by 1%. Show Answer Correct Answer: C) Increase by 2%. 15. Which of the following best describes the relationship between gravitational force and distance between two objects? A) Gravitational force is directly proportional to the distance. B) Gravitational force is inversely proportional to the square of the distance. C) Gravitational force is directly proportional to the square of the distance. D) Gravitational force is inversely proportional to the distance. Show Answer Correct Answer: B) Gravitational force is inversely proportional to the square of the distance. 16. Why did people believe in the Geocentric vs the Heliocentric solar system? A) Geocentric system had been around for a LONG time. B) People don't like change. C) There wasn't enough proof to support the Heliocentric system. D) All of these answers are correct. Show Answer Correct Answer: D) All of these answers are correct. 17. Gold weighs a little ..... on poles than equator. A) Less. B) More. C) All the above. D) None of the above. Show Answer Correct Answer: B) More. 18. If a satellite revolving in an orbit of radius r has time period of 8 hour, a time period of another satellite revolving around the same planet in an orbit of radius 2r will be A) 64 hour. B) $32\sqrt{2}$. C) $16\sqrt{2}$. D) 48 hour. Show Answer Correct Answer: C) $16\sqrt{2}$. 19. If you triple the mass of an object while keeping the acceleration constant, you will ..... A) Have no effect. B) Have 1/3 the force. C) Have half the force. D) Have triple the force. Show Answer Correct Answer: D) Have triple the force. 20. How does gravitational potential energy depend on mass and height? A) Gravitational potential energy depends directly on mass and height. B) Gravitational potential energy is independent of mass and height. C) Gravitational potential energy decreases with increasing mass and height. D) Gravitational potential energy only depends on the mass of the object. Show Answer Correct Answer: A) Gravitational potential energy depends directly on mass and height. 21. The gravitational attraction between an object near the Earth's surface and the Earth. A) Normal force. B) Weight. C) Friction. D) Tension. Show Answer Correct Answer: B) Weight. 22. Which of the following factors affects the escape velocity of an object from the surface of the earth? A) Mass of earth. B) Gravity of satellite. C) Acceleration due to gravity. D) Mass of object. Show Answer Correct Answer: A) Mass of earth. 23. An apple falls from a tree because of gravitational attraction between the earth and apple. If F$_{1}$ is the magnitude of force exerted by the earth on the apple and F$_{2}$ is the magnitude of force exerted by apple on earth, then A) F$_{1}$ is very much greater than F$_{2}$. B) F$_{2}$ is very much greater than F$_{1}$. C) F$_{1}$ is only a little greater than F$_{2}$. D) F$_{1}$ and F$_{2}$ are equal. Show Answer Correct Answer: D) F$_{1}$ and F$_{2}$ are equal. 24. In the equation for gravitational potential energy, 'E$_{p}$' stands for A) Electrical energy. B) Elastic potential energy. C) Kinetic energy. D) Gravitational potential energy. Show Answer Correct Answer: D) Gravitational potential energy. 25. The centers of two 15 kg spheres are separated by 3 meters. What is the gravitational force between the two spheres? A) 2.72 x 10$^{-14}$. B) 1.67 x 10$^{-9}$. C) 1.42 x 10$^{-8}$. D) 3.44 x 10$^{-9}$. Show Answer Correct Answer: B) 1.67 x 10$^{-9}$. ← 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