This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Jackson, Aria, and Hannah are observing a dropped apple in their physics class. According to the universal law of gravitation, how does the apple fall towards the Earth? A) In a radial direction. B) In a straight line. C) In a circular motion. D) In a random pattern. Show Answer Correct Answer: A) In a radial direction. 2. A ball is thrown 180m in upward direction. Find the velocity by which it is thrown. ( Let g = 10m/s ) A) 60m/s. B) 30m/s. C) 40m/s. D) 90m/s. Show Answer Correct Answer: A) 60m/s. 3. What shape is the path of a planet that surround the Sun? A) Focus. B) Circle. C) Ellipse. D) Perihelion. Show Answer Correct Answer: C) Ellipse. 4. What is buoyant force? A) An upward force exerted by fluids on an object. B) An downward force exerted by fluids on an object. C) All the above. D) None of the above. Show Answer Correct Answer: A) An upward force exerted by fluids on an object. 5. Jimmy Donaldson weighs 420N. Find his mass on the earth and on the moon. (g = $10ms^{-2}$ A) 42 kg, 34kg. B) 44 kg, 98kg. C) 42kg, 7kg. D) 42kg, 42kg. Show Answer Correct Answer: D) 42kg, 42kg. 6. What happens to the volume of a substance if its density is less than that of water? A) The substance sinks in water. B) The substance floats on water. C) The volume remains the same. D) The volume increases. Show Answer Correct Answer: B) The substance floats on water. 7. An empty closed drum and a filled drum of same dimension will bring A) Same upthrust. B) Same volume. C) Both (a) and (b). D) Neither (a) nor (b). Show Answer Correct Answer: C) Both (a) and (b). 8. How does gravitational force affect the motion of satellites? A) Gravitational force has no effect on satellite motion. B) Gravitational force causes satellites to fall to Earth. C) Gravitational force keeps satellites in orbit by providing the necessary centripetal force. D) Satellites move faster when gravitational force is weaker. Show Answer Correct Answer: C) Gravitational force keeps satellites in orbit by providing the necessary centripetal force. 9. The force of gravity (mass x gravity) is also known as ..... A) Mass. B) Weight. C) Distance. D) Acceleration. Show Answer Correct Answer: B) Weight. 10. If the two masses of two objects are doubled, the force of gravitational attraction between them ..... A) Doubles. B) Quadruples. C) Cut in Half. D) 4x Smaller. Show Answer Correct Answer: A) Doubles. 11. A ball thrown up vertically return to the earth after 12s . Find the velocity with which it was thrown up? A) 29.4m/s. B) 58.8 m/s. C) 36.5m/s. D) 48.8m/s. Show Answer Correct Answer: B) 58.8 m/s. 12. The satellite used to observe the entire surface of earth is A) Synchronous satellite. B) Polar satellite. C) Both the above. D) None of the above. Show Answer Correct Answer: B) Polar satellite. 13. Choose the factor on which the orbital velocity does not depend when the satellite is orbiting close to the earth's surface: A) The mass of the earth. B) The mass of the satellite. C) The orbital radius. D) The radius of the earth. Show Answer Correct Answer: B) The mass of the satellite. 14. According to the Newton's Universal Law of Gravitation, the force of gravity between two objects is inversely proportional to A) The distance between the objects. B) The product of the masses of the objects. C) The gravitational constant. D) The square of the distance between the objects. Show Answer Correct Answer: D) The square of the distance between the objects. 15. Period of revolution of polar satellite is Nearly ..... A) 80 min. B) 1 day. C) 85 Min. D) 27 hours. Show Answer Correct Answer: C) 85 Min. 16. An apple is hangs on a tree on the earth, Which of the following statements is correct about the interaction between the apple and the earth? A) The force on the apple is greater that the force on the Earth. B) The force on the apple is equal to the force on the earth. C) The force on the Earth is larger than the force on the apple. D) The forces on the apple and the earth are zero because they are not touching each other. Show Answer Correct Answer: B) The force on the apple is equal to the force on the earth. 17. Newton found that the gravitational force between two masses is inversely proportional to the square of ..... A) The distance between them. B) The sum of the masses. C) The product of the masses. D) The strength of the gravitational field. Show Answer Correct Answer: A) The distance between them. 18. The planets in the Solar System revolve around the Sun because the Sun is A) The source of most heat and light energy. B) The strongest source of gravity in the solar system. C) Older than other objects in the solar system. D) Made of hydrogen and helium. Show Answer Correct Answer: B) The strongest source of gravity in the solar system. 19. Two spherical objects have masses of 100 kg and 50 kg. Their centers are separated by a radius distance of 10 m. Find the change in the gravitational attraction Force between them if only the radius distance increases to 20 m in length. A) It does not change the overall force of gravitation. B) It increases by a factor of 2 times stronger. C) It decreases by a factor of 1/4 as weak. D) It increases by a factor of 4 times stronger. Show Answer Correct Answer: C) It decreases by a factor of 1/4 as weak. 20. The mass of the moon is about 1.2% of the mass of the earth. Compared to the gravitational force the earth exerts on the moon, the gravitational force the moon exerts on earth: A) Is the same. B) Is smaller. C) Is greater. D) Varies with its phase. Show Answer Correct Answer: A) Is the same. 21. A satellite orbits Earth at an altitude of 400 km above the planet's surface. What is its linear speed in m s$^{-1}$?Round your answer to three significant digits. Given G = 6.67x10$^{-11}$ N m$^{2}$ kg$^{-2}$. A) 7680 ms$^{-1}$. B) 7860 ms$^{-1}$. C) 7760 ms$^{-1}$. D) 7670 ms$^{-1}$. Show Answer Correct Answer: D) 7670 ms$^{-1}$. 22. Doctor uses ..... thermometer A) Clinical. B) Laboratory. C) Chemical. D) None. Show Answer Correct Answer: A) Clinical. 23. The formula for Coulomb's Law:F= k (q$_{1}$ x q$_{2}$)/r$^{2}$, the q represents: A) Electrostatic force. B) Electric charge. C) Distance between charges. D) Coulomb's constant. Show Answer Correct Answer: B) Electric charge. 24. The first scientist who construct a reflecting telescope ..... A) Einstein. B) Newton. C) All the above. D) None of the above. Show Answer Correct Answer: B) Newton. 25. What is the correct definition of gravitational field strength? A) The mass per unit weight. B) The weight of a small test mass. C) The force acting on a small test mass. D) The force per unit mass acting on a small test mass. Show Answer Correct Answer: D) The force per unit mass acting on a small test mass. ← 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