This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which isotope is used in the treatment of cancer? A) CARBON-14. B) COBALT-60. C) I-101. D) U-235. Show Answer Correct Answer: B) COBALT-60. 2. An object will float on water if it is A) Less dense than water. B) More dense than water. C) The same density as water. D) None of the above. Show Answer Correct Answer: A) Less dense than water. 3. What is the centripetal force required to keep an object moving in a circle of radius 5 meters at a speed of 10 m/s? A) 100 N. B) 20 N. C) 10 N. D) 200 N. Show Answer Correct Answer: D) 200 N. 4. Gravitational force is attractive. Is this force a push or a pull? A) Push. B) Pull. C) All the above. D) None of the above. Show Answer Correct Answer: B) Pull. 5. Which of the following changes would increase the gravitational force between two objects? A) Increase G. B) Increase the mass. C) Increase r. D) Decrease G. Show Answer Correct Answer: B) Increase the mass. 6. The gravitational force between two objects is 20 N. If the distance between them is halved, the force becomes: A) 40 N. B) 80 N. C) 5 N. D) 160 N. Show Answer Correct Answer: B) 80 N. 7. The mass of the earth is $5.972\times10^{24}kg$ $G=6.67\times10^{-11}Nm^2kg^{-2}$ $-7.73\times10^{28}J$ A) $1.90\times10^2m$. B) $3.37\times10^6m$. C) $3.80\times10^8m$. D) $7.60\times10^4m$. Show Answer Correct Answer: C) $3.80\times10^8m$. 8. A 0.55-kg ball, attached to the end of a horizontal cord, is revolved in a circle of radius 1.3 m on a frictionless horizontal surface. If the cord will break when the tension is 75N, what is the maximum speed the ball can have? A) 13 m/s. B) 11.1 m/s. C) 2.2 m/s. D) 9.4 m/s. Show Answer Correct Answer: A) 13 m/s. 9. What is the force of gravitation between the earth and the Sun? A) Depends on the mass of the earth and the Sun. B) Depends on the distance between the earth and the Sun. C) Depends on the density of the earth and the Sun. D) Depends on the temperature of the earth and the Sun. Show Answer Correct Answer: A) Depends on the mass of the earth and the Sun. 10. Two spheres are placed so that their centers are 2.6 m apart. The gravitational force between the two spheres is undefined N. One of the spheres is twice the mass of the other sphere. Find the mass of the LARGER SPHERE! A) 0.37 kg. B) 0.185 kg. C) 0.75 kg. D) 1.5 kg. Show Answer Correct Answer: C) 0.75 kg. 11. The motion of roller coasters depends upon the conversion of potential and kinetic energy. A 100-kg car starts from rest at the top of a hill with a height of 50 m. Which of the following is this car's kinetic energy at the bottom of the hill? A) 5000 J. B) 49, 000 J. C) 150 J. D) 98, 000 J. Show Answer Correct Answer: B) 49, 000 J. 12. If the distance between objects increases, then the gravitational force between the objects will: A) Increase. B) Decrease. C) Remain same. D) None of these. Show Answer Correct Answer: B) Decrease. 13. A planet orbits a star at a certain distance. If the mass of the star is halved, what happens to the gravitational force acting on the planet? A) It remains unchanged. B) It is doubled. C) It is halved. D) It is quadrupled. Show Answer Correct Answer: C) It is halved. 14. This person developed the heliocentric theory and was considered the founder of modern astronomy. A) Galileo. B) Copernicus. C) Aristotle. D) Ptolemy. Show Answer Correct Answer: B) Copernicus. 15. Which of the following is a correct statement about mass and weight? A) Mass varies with location, but weight does not. B) Weight varies with location, but mass does not. C) Both mass and weight vary with location. D) Neither mass nor weight vary with location. Show Answer Correct Answer: B) Weight varies with location, but mass does not. 16. Which will reach the ground first under ideal conditions?Height from which it is dropped is 70m. A) A metal ball of mass 400kg. B) A wooden stick of length 7cm and breadth 5cm. Density of the wood is 1.5g/cc. C) A plastic ball of mass 400kg. D) The plastic and metal balls will reach the ground at the same time, and the wooden stick will fall later. E) All of them will fall at the same time. Show Answer Correct Answer: E) All of them will fall at the same time. 17. What does Kepler's second law imply about the area swept by a planet in its orbit over equal time intervals? A) The area is smaller when the planet is closer to the Sun. B) The area is larger when the planet is closer to the Sun. C) The area is equal regardless of the planet's position in its orbit. D) The area is unrelated to the planet's position in its orbit. Show Answer Correct Answer: C) The area is equal regardless of the planet's position in its orbit. 18. RELATIVE DENSITY OF SILVER IS 10.8 kg/m$^{3}$ THE DENSITY OF WATER IS 10$^{3 }$kg/m$^{3}$ WHAT IS THE DENSITY OF SILVER IN SI UNIT A) 10X10$^{3}$kg/m$^{3}$. B) 10.8 kg/m$^{3}$. C) 10$^{3}$kg/m$^{3}$. D) 10.8 X10$^{3}$kg/m$^{3}$. Show Answer Correct Answer: D) 10.8 X10$^{3}$kg/m$^{3}$. 19. Any object with mass has gravity. A) True. B) Never. C) False. D) Sometimes. Show Answer Correct Answer: A) True. 20. Planet X has twice Earth's mass and three times Earth's radius. The magnitude of the gravitational field near Planet X's surface is most nearly A) 10 N/kg. B) 7 N/kg. C) 2 N/kg. D) 20 N/kg. Show Answer Correct Answer: C) 2 N/kg. 21. The height of a geostationary Satellite from the surface of earth is A) 3600 m. B) 3600 km. C) 36000 km. D) 36000 m. Show Answer Correct Answer: C) 36000 km. 22. If a body is taken to the Moon, its mass will: A) Become zero. B) Decrease. C) Increase. D) Remain the same. Show Answer Correct Answer: D) Remain the same. 23. Why are tides caused? A) Attraction forces exerted on the earth by the moon. B) Gravitational forces exerted on the moon by the earth. C) Gravitational forces acting on the earth by the moon. D) Attraction forces acting on the moon by the earth. Show Answer Correct Answer: C) Gravitational forces acting on the earth by the moon. 24. Which of the following is true about geostationary satellite? A) Above different geographical location. B) The orbital period is longer than 24 hours. C) It does not experience any gravitational pull. D) Its period of rotation is one day. Show Answer Correct Answer: D) Its period of rotation is one day. 25. Why do objects fall at the same rate in a vacuum? A) Due to differences in mass. B) Due to differences in shape. C) Due to air resistance. D) Due to gravity. Show Answer Correct Answer: D) Due to gravity. 26. Out of the following, the only incorrect statement about satellites is: A) Geostationary satellites are launched in the equatorial plane. B) We can use just one geostationary satellite for global communication around the globe. C) A satellite cannot move in a stable orbit in a plane passing through the earth's centre. D) The speed of a satellite increases with an increase in the radius of its orbit. Show Answer Correct Answer: D) The speed of a satellite increases with an increase in the radius of its orbit. 27. Two masses 8000 kg and 1500 kg are 1.5 m apart. Find their gravitational pull. A) 3000 N. B) 3 N. C) 0.0003 N. D) 30 N. Show Answer Correct Answer: C) 0.0003 N. 28. If the distance between two objects is halved, what happens to the gravitational force between them? A) It becomes four times larger. B) It becomes half as large. C) It becomes four times smaller. D) It remains the same. Show Answer Correct Answer: A) It becomes four times larger. 29. What does "helios" mean? A) Earth. B) Sun. C) Moon. D) Center of. Show Answer Correct Answer: B) Sun. 30. A body of mass m rises to a height h = 1/5$^{th}$ of radius of Earth above the surface of Earth. The increase in its P.E is A) $\frac{6}{5}mgh$. B) Mgh. C) $\frac{5}{6}mgh$. D) $\frac{4}{5}mgh$. Show Answer Correct Answer: C) $\frac{5}{6}mgh$. 31. Earth revolves around ..... , because it has the ..... in the solar system. A) The moon; most gravitational force. B) The sun; most gravitational force. C) Jupiter; most gravitational. D) The sun; least gravitational force. Show Answer Correct Answer: B) The sun; most gravitational force. 32. Explain why a comet's speed changes as it travels along its orbit. A) Due to changes in its mass. B) Because of Kepler's second law, which states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time. C) Because of the gravitational pull from other planets. D) Due to the comet's rotation. Show Answer Correct Answer: B) Because of Kepler's second law, which states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time. 33. Which configuration will result in the greatest gravitational force? A) Small masses far apart. B) Large masses far apart. C) Small masses close together. D) Large masses close together. Show Answer Correct Answer: D) Large masses close together. 34. What did Isaac Newton invent in his early twenties? A) Calculus. B) Microscope. C) Thermometer. D) Telescope. Show Answer Correct Answer: A) Calculus. 35. What is the definition of gravitational force? A) Gravitational force is the energy produced by a mass in motion. B) Gravitational force is the force that repels two masses. C) Gravitational force is the force of attraction between two masses. D) Gravitational force is the force that acts only on objects in space. Show Answer Correct Answer: C) Gravitational force is the force of attraction between two masses. 36. Centripetal acceleration is the acceleration ..... A) Toward the center of a circle. B) Away from the center of the circle. C) When an object is going straight. D) That doesn't exist. Show Answer Correct Answer: A) Toward the center of a circle. 37. For a given force acceleration is inversely proportional to the mass of an object.A. The above statement is correct because F=maB.The statement is not correct because the value of g is constant. A) Option A is wrong. B) Both option A and B are wrong because the reasons given are wrong. C) Only option A is correct. D) Both A and B are correct. Show Answer Correct Answer: C) Only option A is correct. 38. The force of gravitation is directly proportional to ..... and inversely proportional to ..... A) 1)Product of masses 2)Distance squared. B) 1)Distance squared 2)Product of masses. C) 1) Distance cubed 2) Average of their mass. D) None of the above. Show Answer Correct Answer: A) 1)Product of masses 2)Distance squared. 39. Which of the following statements is most true about Newton's law of gravitation? A) It is a force that objects with big mass apply on objects with much smaller masses. B) It is a force that exists between any two bodies with mass. C) It is a force that exists between planets, stars and other heavenly bodies. D) It is a force that pushes objects around a circle in orbit. Show Answer Correct Answer: B) It is a force that exists between any two bodies with mass. 40. A child riding a merry-go-round feels a centripetal force. How would the force change if the velocity doubled (2x)? A) Decrease to one quarter (1/4). B) Double (2x). C) Quadruple (4x). D) Decrease to one half (1/2). Show Answer Correct Answer: C) Quadruple (4x). 41. ..... improved on earlier models of the telescope to identify 4 moons of Jupiter, rings of Saturn, phases of Venus, and more to become known as the "Father of Modern Observational Astronomy." A) Copernicus. B) Ptolemy. C) Newton. D) Galileo. Show Answer Correct Answer: D) Galileo. 42. The force of gravity on Jupiter is a little more than 2 times the gravitational force on Earth. If an object has a mass of 50 kg and a weight of 490 N on Earth, what would be the object's approximate mass and weight on Jupiter? A) 50 kg and 490 N. B) 100 kg and 490 N. C) 50 kg and 980 N. D) 100 kg and 980 N. Show Answer Correct Answer: C) 50 kg and 980 N. 43. Find Mercury's period around the Sun in Earth years. Use Table 1 on page 180. A) 0.240 years. B) 0.386 years. C) 0.621 years. D) None of the above. Show Answer Correct Answer: A) 0.240 years. 44. ..... keeps all objects in the solar system orbiting around the sun. A) Tension. B) Applied force. C) Gravitational pull. D) None of the above. Show Answer Correct Answer: C) Gravitational pull. 45. How does the mass of an object affect the gravitational force it experiences? A) The greater the mass, the lesser the gravitational force. B) Mass affects only the direction of gravitational force. C) Mass does not affect gravitational force. D) The greater the mass, the greater the gravitational force. Show Answer Correct Answer: D) The greater the mass, the greater the gravitational force. 46. When the distance between two objects increases the gravitational force between them A) Decreases. B) Increases. C) No change. D) None of the above. Show Answer Correct Answer: A) Decreases. 47. An increase in the strength of the gravitational field surrounding an object result from an increase in that object's ..... A) Orbit. B) Radius. C) Density. D) Mass. Show Answer Correct Answer: D) Mass. 48. Which of the following does not affect the gravitational force between two objects? A) Mass of the objects. B) Distance between the objects. C) Temperature of the objects. D) None of the above. Show Answer Correct Answer: C) Temperature of the objects. 49. The force of attraction between two unit point masses separated by a unit distance is called(a) gravitational potential (b) acceleration due to gravity(c) gravitational field (d) universal gravitatuional constant A) A. B) C. C) D. D) B. Show Answer Correct Answer: C) D. 50. The neutrino is a massless particle. Can it interact gravitationally with the Earth? A) Yes, because the Earth is big enough it can compensate for the massless neutrino. B) Yes, especially when the neutrino is near the Earth's surface. C) Yes, when the neutrino orbits around the Earth. D) No. Show Answer Correct Answer: D) No. 51. The period of a satellite in a circular orbit around a planet is independent of: A) The radius of the planet. B) The mass of the planet. C) The mass of the satellite. D) All of these. Show Answer Correct Answer: C) The mass of the satellite. 52. Two objects are attracted to each other with 4 N of gravitational force.What would the force between them be if the distance between them was cut in half? A) 8N. B) 16N. C) 1N. D) 2 N. Show Answer Correct Answer: B) 16N. 53. If I double the mass of one object without changing anything else, What would happen to the gravitational force between that object and any other object? A) Quadruples. B) $\frac{1}{4}$. C) Cut in Half. D) Doubles. Show Answer Correct Answer: D) Doubles. 54. The gravitational force is: A) A mutual force that exists due to the mass of an object. B) A normal force. C) A mutual force created by tension. D) A mutual force that exists due to the charge of an object. Show Answer Correct Answer: A) A mutual force that exists due to the mass of an object. 55. What is the escape velocity on Earth? A) 112 km/s. B) 11.2 km/s. C) 1.12 km/s. D) 11.2 m/s. Show Answer Correct Answer: B) 11.2 km/s. 56. WHAT CAUSES TINDAL WAVES IN THE SEA? A) GRAVITATION EFFECT ON THE EARTH BY MOON. B) GRAVITATIONAL EFFECT ON THE EARTH BY THE SUN. C) THE ATMOSPHERIC IMPACT OF EARTH. D) NONE OF THESE. Show Answer Correct Answer: A) GRAVITATION EFFECT ON THE EARTH BY MOON. 57. Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? A) F/2d. B) F/3d. C) F/6d. D) F/9d. Show Answer Correct Answer: D) F/9d. 58. An object with more mass will exert greater gravitational force than an object with lesser mass. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 59. What is the force that acts on an object moving in a circular path and is directed towards the center of the circle? A) Frictional Force. B) Centripetal Force. C) Centrifugal Force. D) Gravitational Force. Show Answer Correct Answer: B) Centripetal Force. 60. What will a negative charge do with a negative charge? A) Repel. B) Attract. C) Nothing. D) None of the above. Show Answer Correct Answer: A) Repel. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 8Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books