This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If you halve the distance between two masses of 250 kg each, what happens to the gravitational force? A) F is multiplied by 2. B) F is multiplied by 4. C) F is decreased by a factor of 4. D) F stays the same. Show Answer Correct Answer: B) F is multiplied by 4. 2. What real-world application relies on Newton's Law of Gravitation? A) Predicting satellite trajectories. B) Calculating chemical reactions. C) Designing electrical circuits. D) Measuring sound waves. Show Answer Correct Answer: A) Predicting satellite trajectories. 3. What is the total energy of a satellite of mass m orbiting the Earth at a distance equal to 2 times the Earth's radius above its surface? A) $E=-\frac{GMm}{6R_E}$. B) $E=-\frac{GMm}{4R_E}$. C) $E=-\frac{GMm}{2R_E}$. D) $E=-\frac{2GMm}{R_E}$. E) $E=-\frac{4GMm}{R_E}$. Show Answer Correct Answer: A) $E=-\frac{GMm}{6R_E}$. 4. A satellite A of mass m is at a distance r from the surface of the earth. Another satellite B of mass 2 m is at a distance of 2 r from the earth's surface. Their time periods are in the ratio of A) 1:2. B) 1:16. C) 1:32. D) $1:2\sqrt{2}$. Show Answer Correct Answer: D) $1:2\sqrt{2}$. 5. How does the orbital speed of a planet change as it moves closer to the Sun according to Kepler's laws? A) The speed decreases. B) The speed becomes zero. C) The speed remains constant. D) The speed increases. Show Answer Correct Answer: D) The speed increases. 6. If a big stone and a small stone when dropped from a height, then both will strike the ground at the same time bcoz: A) The value of g does not depend of mass of object. B) The value of g depends on mass of object. C) Both a and b. D) None. Show Answer Correct Answer: A) The value of g does not depend of mass of object. 7. The areal velocity of planetary motion is A) A constant. B) Not a constant. C) Varies with time. D) None of these. Show Answer Correct Answer: A) A constant. 8. Who created the Universal Law of Gravitation? A) Copernicus. B) Newton. C) Kepler. D) Galileo. Show Answer Correct Answer: B) Newton. 9. Who proposed Earth centered model? A) Copernicus. B) Ptolemy. C) Kepler. D) Tycho Brahe. Show Answer Correct Answer: B) Ptolemy. 10. Which experiment would best demonstrate the concept of universal gravitation? A) Dropping two different masses from the same height and observing their fall. B) Measuring the force between two suspended masses in a vacuum chamber. C) Observing the orbit of a satellite around Earth. D) Calculating the weight of an object on different planets. Show Answer Correct Answer: B) Measuring the force between two suspended masses in a vacuum chamber. 11. A boy is whirling a stone tied with a string in an horizontal circular path. If the string breaks, the stone A) Will continue to move in the circular path. B) Will move along a straight line towards the centre of the circular path. C) Will move along a straight line tangential to the circular path. D) Will move along a straight line perpendicular to the circular path away from the boy. Show Answer Correct Answer: C) Will move along a straight line tangential to the circular path. 12. Weight of an object on moon is ..... of the weight on earth A) 1/6th. B) 1/5th. C) Both a and b. D) None. Show Answer Correct Answer: A) 1/6th. 13. Find the force of gravity (Fg) for two objects with:m1 = 100 kgm2 = 1000 kgd = 500 m A) 2.67 x 10$^{-11}$ N. B) 0.4 N. C) 6.67 x 10$^{-11}$ N. D) 1.3 x 10$^{-8}$ N. Show Answer Correct Answer: A) 2.67 x 10$^{-11}$ N. 14. The value of g is maximum on earth at. A) Poles. B) Equator. C) Both. D) None. Show Answer Correct Answer: A) Poles. 15. If I double the mass of one object without changing anything else, What would happen to the gravitational force? A) Doubles. B) Quadruples. C) Cut in Half. D) $\frac{1}{4}$. Show Answer Correct Answer: A) Doubles. 16. The gravitational force between two bodies is decreased by 36% when the distance between them is increased by 3m. The initial distance between them is A) 6m. B) 9m. C) 12m. D) 15m. Show Answer Correct Answer: C) 12m. 17. In the equation for gravitational potential energy, 'g' stands for ..... A) Grams. B) Gravity. C) Gravitational field strength. D) Energy. Show Answer Correct Answer: C) Gravitational field strength. 18. What type of interaction is a gravitational force? A) Attractive and repulsive. B) Repulsive. C) Attractive. D) No interaction exist. Show Answer Correct Answer: C) Attractive. 19. Gravity attracts all objects towards one another. A) False. B) True. C) It depends. D) None of the above. Show Answer Correct Answer: B) True. 20. The kinetic energy of an orbiting sattelite is given by ..... A) $\frac{1}{2}\\frac{GMm}{\left(R+h\right)}$. B) $\frac{1}{2}\\frac{GMm}{\left(R+h\right)^2}$. C) $\frac{1}{2}\\frac{GMm}{h^2}$. D) None of the above. Show Answer Correct Answer: A) $\frac{1}{2}\\frac{GMm}{\left(R+h\right)}$. 21. Which of the following law is not Kepler's law of planetary motion A) Law of periods. B) Law of orbit. C) Harmonic law. D) Law of motion. Show Answer Correct Answer: D) Law of motion. 22. A line drawn from a planet to the Sun always sweeps over equal areas in equal intervals of time, when the planet moves further from the sun, the planet will move A) Faster. B) Slower. C) Constant at every point. D) None of the above. Show Answer Correct Answer: B) Slower. 23. $Fg=\frac{Gm_1m_2}{d^2}$ A) $2.22\times10^{-11}$. B) $1.48\times10^{-11}$. C) $7.4\times10^{-12}$. D) 0.111. Show Answer Correct Answer: C) $7.4\times10^{-12}$. 24. School bags have a broader base to reduce A) Pressure. B) Weight. C) Air resistance. D) Normal reaction. Show Answer Correct Answer: A) Pressure. 25. A mass weighing W can float if the upthrust U is related as A) U>W. B) U=W. C) $U D) $U\ge W$. Show Answer Correct Answer: A) U>W. ← 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