CBSE Class 11 (Science) Gravitation — practice questions
94 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) Gravitation in the app →As per your syllabus, Kepler's law of areas states which quantity is constant for a planetary orbit?As per your syllabus, Kepler's law of periods states which relation between period T and semi-major axis a?As per your syllabus, Kepler's 2nd law (equal areas in equal times) is equivalent to conservation of which quaAs per your syllabus, Newton's UNIVERSAL law of gravitation states that F between two point masses is proportiAs per your syllabus, the value of the universal gravitational constant G is approximately which?As per your syllabus, the FIRST experimental measurement of G was made by which scientist and when?As per your syllabus, the force on mass m₂ due to m₁ and the force on m₁ due to m₂ obey which relation?As per your syllabus, the gravitational force between two point masses is which type of force in nature?As per your syllabus, the dimensions of the gravitational constant G are which?As per your syllabus, Table 7.1, Kepler's 3rd law is verified by planetary data showing T² / a³ is which?As per your syllabus, eqn 7.12, the acceleration due to gravity on Earth's surface is given by which expressioAs per your syllabus, eqn 7.15, for SMALL height h (h ≪ R_E) above Earth, the variation of g with h is approxiAs per your syllabus, eqn 7.19, for depth d BELOW Earth's surface, the variation of g with d is which?As per your syllabus, the value of g is MAXIMUM at which location on or near the Earth?As per your syllabus, the value of g at the CENTRE of the Earth (assuming uniform density) is which?As per your syllabus, at height h equal to R_E above the surface, the value of g(h) becomes which fraction of As per your syllabus, using g and R_E gives M_E ≈ which value?As per your syllabus, using the Moon's orbital data (T=27.3 d, R = 3.84×10⁸ m) gives M_E ≈ which value?As per your syllabus, the gravitational acceleration of a body INSIDE a uniform spherical shell of mass M is wAs per your syllabus, the dimensions of g (acceleration due to gravity) are which?As per your syllabus, eqn 7.15, for an altitude of h = 8 km above Earth (R_E = 6400 km), g decreases by approxAs per your syllabus, eqn 7.25, the gravitational potential energy of a particle of mass m at distance r from As per your syllabus, the gravitational PE for two particles of masses m₁ and m₂ separated by r is which?As per your syllabus, eqn 7.31, the escape speed from a planet of mass M and radius R is which expression?As per your syllabus, eqn 7.32, the escape speed can also be written using g and R as which?As per your syllabus, the numerical value of escape speed from the Earth's surface is approximately which?As per your syllabus, the escape speed from the Moon's surface is approximately which?As per your syllabus, the gravitational PE of a particle DOUBLED in distance (r → 2r) from a mass M changes frAs per your syllabus, total gravitational PE of four equal masses at corners of a square of side l is approximAs per your syllabus, the escape speed from a planet depends on which set of properties?As per your syllabus, the gravitational POTENTIAL (per unit mass) at distance r from a point mass M is which?As per your syllabus, the gravitational potential energy is a scalar quantity with dimensions which?As per your syllabus, eqn 7.35, the orbital speed of a satellite at height h above Earth's surface is which?As per your syllabus, eqn 7.37, the time period of a satellite at distance (R+h) from Earth's centre is which?As per your syllabus, eqn 7.39, the period of a satellite orbiting CLOSE to Earth's surface (h ≪ R_E) is approAs per your syllabus, eqn 7.40, the kinetic energy of an orbiting satellite of mass m at distance (R+h) is whiAs per your syllabus, eqn 7.41, the potential energy of an orbiting satellite at distance (R+h) is which?As per your syllabus, eqn 7.42, the TOTAL mechanical energy of an orbiting satellite is which?As per your syllabus, the relationship between total energy E and PE of an orbiting satellite is which?As per your syllabus, the period of Mars' orbit (orbit radius 1.52 × Earth's) is approximately which?As per your syllabus, (geostationary satellite, not stated but standard), the orbital period of a geostationarAs per your syllabus, energy required to move a satellite from a circular orbit at 2R_E to 4R_E around Earth iAs per your syllabus, + Example 7.7, for the Moon's orbit (R ≈ 3.84 × 10⁵ km), the time period computed from kAs per your syllabus, the orbital speed v of a satellite scales with orbital radius r as which?Naked eye observations of the planets were recorded by:Tycho Brahe came from the country of:Brahe's compiled data were analysed by his assistant:Kepler extracted from the data how many laws?Kepler's laws enabled Newton to propose his universal law of:By the law of orbits, planets move in orbits that are:In a planet's elliptical orbit, the Sun sits at:The point of a planet's orbit closest to the Sun is the:The point of a planet's orbit farthest from the Sun is the:The semimajor axis of an orbit is half the distance from:The law of orbits departed from the model that allowed only:An ellipse of which the circle is a special case is a curve that is:An ellipse can be drawn using pins, a pencil and a:By the law of areas, the planet to Sun line sweeps equal areas in:The law of areas explains why a planet moves slower when it is:By the law of periods, the square of the period is proportional to:The law of periods uses which measurement of the ellipse?The escape speed for the moon works out to about:The moon's escape speed compared with the earth's is smaller by about:The low escape speed of the moon explains why it has no:Kepler's three laws describe the motion of:Tycho Brahe recorded his observations using:Kepler derived his three laws by analysing naked-eye planetary records compiled by whom?For Earth's orbit, the ratio of semi-minor to semi-major axis b/a is closest to:Kepler's second law follows from angular momentum conservation, which holds for:For a planet orbiting the Sun, which is NOT conserved?An astronaut in orbit feels weightless because:A body placed inside a hollow metal sphere is shielded from the gravity of outside masses:The gravitational force between two arbitrary finite rigid bodies is:The familiar expression mgh for gravitational potential energy is:In which year did Henry Cavendish first measure the gravitational constant G?The conventional value of standard gravity g_n, fixed by the CGPM in 1901, is:An object at sea level weighs roughly how much more at the poles than at the Equator?Besides Earth's spin, what lowers g at the Equator?Local changes in g caused by mountains and rock density are called:What is the measurement of Earth's gravity called?Dense ore-bearing rock below a site makes local g:Apart from m/s², acceleration due to gravity can also be expressed in:A rock weighs 72 N on Earth's surface. Its weight at height R_E/2 above the surface is:For a uniform-density Earth, a 100 N body taken to depth R_E/4 weighs:What minimum launch speed lets a body leave Earth for good?A rocket leaves Earth at three times the escape speed. Its speed far from Earth is about?A satellite in a circular orbit has kinetic energy 5 MJ. What is the magnitude of its potential energy?What is the sign of the total energy of an orbiting satellite?What is the gravitational force on a particle inside a uniform hollow spherical shell?Can a hollow shell shield a body inside it from outside gravitational pulls?For a particle outside a spherically symmetric body, the body's pull acts as if its mass were?Changing the arbitrary constant in gravitational potential energy changes the gravitational force by?For a satellite in an elliptical orbit, the orbital radius in the period formula is replaced by the?In an elliptical satellite orbit, the total mechanical energy is?