Gravitation (गुरुत्वाकर्षण) Ch(9) Practice Quiz in Hindi Part – 2 || Class 9 Science Practice Quizzes in English Posted on February 28, 2025February 28, 2025 by Anshul Gupta0% 0 votes, 0 avg 0 Gravitation (गुरुत्वाकर्षण) Ch(9)Practice Quiz in Hindi Part – 2 || Class 9 Science Practice Quizzes in English 1 / 201. What is the name of the force that causes a change in the direction of motion of an object moving in a circular path? A. Magnetic force B. Gravitational force C. Frictional force D. Centripetal force Explanation: The centripetal force is responsible for keeping an object moving in a circular path by causing a continuous change in its direction.2 / 202. What is the density of a substance? A. Mass per unit volume B. Volume per unit mass C. Force per unit area D. Weight per unit volume Explanation: Density is defined as the mass of a substance per unit volume.3 / 203. What is the relationship between the weight of an object and the acceleration due to gravity? A. Weight is equal to acceleration due to gravity B. Weight is inversely proportional to acceleration due to gravity C. Weight is independent of acceleration due to gravity D. Weight is directly proportional to acceleration due to gravity Explanation: The weight of an object is directly proportional to the acceleration due to gravity.4 / 204. What is the relationship between the weight of an object and its location? A. Weight is independent of location B. Weight is always greater at higher altitudes C. Weight is always lower at higher altitudes D. Weight varies depending on location Explanation: The weight of an object depends on the acceleration due to gravity, which varies with location.5 / 205. What is the relationship between the pressure exerted by an object and the area over which the force is applied? A. Pressure is equal to area B. Pressure is independent of area C. Pressure is directly proportional to area D. Pressure is inversely proportional to area Explanation: The pressure exerted by an object is inversely proportional to the area over which the force is applied.6 / 206. What is the value of acceleration due to gravity on the Moon compared to Earth? A. The same B. Higher C. Lower D. Varies depending on the object's mass Explanation: The acceleration due to gravity on the Moon is lower than on Earth due to the Moon’s lower mass.7 / 207. What is the reason why a nail has a pointed tip? A. To increase surface area B. To decrease surface area C. To increase pressure D. To decrease pressure Explanation: A pointed tip concentrates the force over a smaller area, leading to increased pressure.8 / 208. What is free fall? A. When an object falls under the influence of gravity alone B. When an object is stationary C. When an object is thrown upwards D. When an object falls with air resistance Explanation: Free fall is when an object falls under the influence of gravity alone, without any other forces acting on it.9 / 209. What is the name of the principle that states that the pressure exerted in any confined mass of fluid is transmitted undiminished in all directions? A. Boyle's law B. Pascal's law C. Archimedes' principle D. Charles's law Explanation: Pascal’s law states that pressure applied to a confined fluid is transmitted equally in all directions throughout the fluid. 10 / 2010. What is the mass of an object? A. The force with which it is attracted towards the Earth B. Its weight C. The measure of its inertia D. Its volume Explanation: The mass of an object is the measure of its inertia.11 / 2011. What is the reason why buildings have wide foundations? A. To decrease pressure B. To increase surface area C. To increase pressure D. To decrease surface area Explanation: Wide foundations distribute the weight of the building over a larger area, reducing the pressure on the ground.12 / 2012. What is the direction of the gravitational force between the Earth and an object on its surface? A. Upwards B. Downwards C. Varies depending on the object's location D. Sideways Explanation: The gravitational force between the Earth and an object on its surface acts downwards, towards the center of the Earth.13 / 2013. What is the effect of air resistance on falling objects? A. It causes objects to fall faster B. It has no effect on falling objects C. It causes objects to float D. It causes objects to fall slower Explanation: Air resistance opposes the motion of falling objects, causing them to fall slower.14 / 2014. What is the weight of an object? A. Its mass B. Its volume C. Its density D. The force with which it is attracted towards the Earth Explanation: The weight of an object is the force with which it is attracted towards the Earth.15 / 2015. What is the name of the instrument used for determining the density of liquids? A. Lactometer B. Barometer C. Hydrometer D. Thermometer Explanation: A hydrometer is used to measure the density of liquids.16 / 2016. What is the value of acceleration due to gravity at the poles compared to the equator? A. The same B. Varies depending on the object's mass C. Higher D. Lower Explanation: The value of g is greater at the poles than at the equator due to the Earth’s shape.17 / 2017. What is the name of the instrument used to determine the purity of a sample of milk? A. Barometer B. Hydrometer C. Thermometer D. Lactometer Explanation: A lactometer is used to measure the density of milk, which can indicate its purity.18 / 2018. What is the direction of the buoyant force on an object submerged in a fluid? A. Varies depending on the object's shape B. Sideways C. Downwards D. Upwards Explanation: The buoyant force acts in the upward direction, opposing the force of gravity.19 / 2019. What is the relationship between the mass of an object and its inertia? A. Mass and inertia are the same thing B. Greater mass means lower inertia C. Mass and inertia are independent of each other D. Greater mass means greater inertia Explanation: The greater the mass of an object, the greater its inertia.20 / 2020. What is the force that attracts all objects in the universe towards each other? A. Frictional force B. Gravitational force C. Electric force D. Magnetic force Explanation: The force of attraction between objects is called the gravitational force.Please insert your information to see your ranking अपनी Ranking जानने के लिए कृपया अपनी जानकारी भरे NamePhone Number Your score isThe average score is 0% 0% Restart quiz Category: Class 9 Science Quizzes in English
