This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 32 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the distance between two objects is tripled, how does the gravitational force between them change according to the Law of Gravitation? A) It becomes nine times weaker. B) It becomes three times weaker. C) It becomes nine times stronger. D) It remains unchanged. Show Answer Correct Answer: A) It becomes nine times weaker. 2. Which of the following statement is correct regarding geostationary satellites. A) Satellite that moves around the Earth at changing orbit height. B) It is used to get the information for weather broadcasting, GPS and imaging the earth surface. C) Orbit period is 24 hours, same to the Earth orbit period. D) Its orbit must not always be above the earth quarter. Show Answer Correct Answer: C) Orbit period is 24 hours, same to the Earth orbit period. 3. According to Newton's Law of Universal Gravitation, what happens to the gravitational force between two objects if the distance between them is doubled? A) The gravitational force is halved. B) The gravitational force is doubled. C) The gravitational force is reduced to one-fourth. D) The gravitational force remains the same. Show Answer Correct Answer: C) The gravitational force is reduced to one-fourth. 4. Is it true that the moon falls? A) No, it could have fallen by now. B) No, there is no good explanation as to why. C) Yes, the moon is falling around the earth due to its tangential velocity. D) Yes, the moon is falling straight down. Show Answer Correct Answer: C) Yes, the moon is falling around the earth due to its tangential velocity. 5. Galileo proved that objects fall at the same rate, regardless of their: A) Mass. B) Size. C) Shape. D) All of the above. Show Answer Correct Answer: A) Mass. 6. The variables that affect the gravitational interaction between two objects are: A) Masses and directions of motions of the objects. B) Masses and speeds of the objects. C) Masses and distances between the objects. D) Distance between and speeds of the objects. Show Answer Correct Answer: C) Masses and distances between the objects. 7. Given, acceleration due to gravity on surface of earth is g. If g' is acceleration due to gravity at a height h above the surface of earth, then A) G'=g. B) G' $ C) G' $>g$. D) G'=0. Show Answer Correct Answer: B) G' $ 8. The minimum velocity with which a body should be thrown vertically upwards from the surface of the Earth so that it escapes the Earth's gravitational field, is called the ..... of the body. A) Orbital velocity. B) Critical Velocity. C) Vertical velocity. D) Escape Velocity. Show Answer Correct Answer: D) Escape Velocity. 9. Who discovered the Law of Gravitation? A) Thomas Edison. B) Albert Einstein. C) Isaac Newton. D) Galileo Galilei. Show Answer Correct Answer: C) Isaac Newton. 10. The law of universal gravitation is credited to whom? A) Einstein. B) Galileo. C) Darwin. D) Newton. Show Answer Correct Answer: D) Newton. 11. The weight of body at earth's surface is W. At a depth half way to the centre of the earth, it will be (assuming uniform density in earth): A) W. B) W /2. C) W /4. D) Zero. Show Answer Correct Answer: B) W /2. 12. What did Henry Cavendish's experiment determine? A) The value of g. B) The value of the gravitational constant. C) The value of the Earth's mass. D) The value of the Moon's acceleration. Show Answer Correct Answer: B) The value of the gravitational constant. 13. Physical quantity are ..... A) Quantity that are being measured. B) Comparing unknown quantity with quantity. C) Dependent on each other. D) None. Show Answer Correct Answer: A) Quantity that are being measured. 14. In which case the escape velocity is maximum A) When angle of projection is 45$^\circ$. B) When it is projected vertically up. C) When it is projected horizontally. D) The escape velocity is independent of the angle of projection. Show Answer Correct Answer: D) The escape velocity is independent of the angle of projection. 15. What is the force of gravitation between two objects proportional to? A) The distance between them. B) The product of their masses. C) The square of the distance between them. D) Both B and C. Show Answer Correct Answer: D) Both B and C. 16. What does the law of gravitational force depend on between two objects? A) Color and shape. B) Speed and direction. C) Mass and distance. D) Temperature and pressure. Show Answer Correct Answer: C) Mass and distance. 17. Closest distance between a planet and the sun (called periapsis for other celestial bodies) A) Perihelion. B) Apogee. C) Minimum Orbital Intersection Distance. D) Maximum Solar Elongation. Show Answer Correct Answer: A) Perihelion. 18. Kepler's third law states that the square of the orbital period of a planet is proportional to A) Square of its distance from the Sun. B) Cube of its distance from the Sun. C) Fourth power of its distance from the Sun. D) Cube root of its distance from the Sun. Show Answer Correct Answer: B) Cube of its distance from the Sun. 19. Why do all of the planets orbit the sun rather than Earth? A) The sun has more mass. B) The sun is a star. C) The Earth is heavier. D) The sun is in the middle of the milky way. Show Answer Correct Answer: A) The sun has more mass. 20. A geo-stationary satellite is orbiting the earth at a height of 6 R about the surface of earth, R being the radius of earth. The time period of another satellite at a height of 2.5 R from the surface of earth is A) 10 hr. B) $\left(\frac{6}{\sqrt{2}}\right)hr$. C) 6 hr. D) $6\sqrt{2}hr$. Show Answer Correct Answer: D) $6\sqrt{2}hr$. 21. Gravitational force is always ..... in nature. A) ATTRACTIVE. B) LUMINOUS. C) LOWER. D) ALL. Show Answer Correct Answer: A) ATTRACTIVE. 22. As the product of two objects' masses increases, the pull of gravity A) Increases. B) Decreases. C) Stays the same. D) Constant. Show Answer Correct Answer: A) Increases. 23. Why doesn't a heavy object fall faster than a light object? A) Because the force of gravity is weaker on heavy objects. B) Because the force of gravity is stronger on heavy objects. C) Because the acceleration due to gravity is the same for all objects. D) Because the acceleration due to gravity is different for heavy and light objects. Show Answer Correct Answer: C) Because the acceleration due to gravity is the same for all objects. 24. 7) When a mango falls from a mango tree then A) Only the Earth attracts the mango. B) Only the mango attracts the Earth. C) Both the mango and the Earth attract each other. D) Both the mango and the Earth repel each other. Show Answer Correct Answer: C) Both the mango and the Earth attract each other. 25. What is the effect of more mass between two objects on gravitational force? A) Disappears. B) Remains the same. C) Increases. D) Decreases. Show Answer Correct Answer: C) Increases. ← 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