Gravitation Class 12 Physics MCQ
Class 12 Physics students should refer to the following multiple-choice questions with answers for Gravitation in standard 12. These MCQ questions with answers for Grade 12 Physics will come in exams and help you to score good marks
Gravitation MCQ Questions Class 12 Physics with Answers
Question: If a rock is brought from the surface of the moon,
(B) its weight will change but not mass
(D) its mass and weight both will remain same
(C) s/m2
(B) m/s2
(D) m/s
(B) N–m2/kg
(C) N–m/kg
(D) N -m2/kg2
(B) Our earth does not behave like a magnet.
(D) All bodies fall at the same rate in vacuum.
(B) inside the earth
(D) above the surface of earth
(B) 4 times
(C) 1/2 times
(D) 2 times
(B) uniform velocity
(D) none of these
(B) M
(C) M + 6
(D) zero
(B) of a body in interplanetary space is maximum
(D) none of these
(B) 8.9 m/s
(C) 9.8 m/s2
(el) 9.8 m/s
(B) gravitational constant
(D) all of these
(B) acts in the opposite direction of the motion
(D) increases as the body moves up
(B) at the surface of the earth only
(D) at the surface of the moon only
(B) 980N
(C) 98 N
(D) none of these
(B) 9.80 dynes
(C) 98 dynes
(D) none of these
CLOUMN-I | COLUMN-II |
(A) Attraction between two planets | (p) gravity |
(B) Attraction between a body and a planet | (q) weightlessness |
(C) Free fall | (r) gravitational force |
(D) Weight | (s) gravitation |
Answer : (A → s), (B → p), (C → q), (D → r)
CLOUMN-I | COLUMN-II |
(A) A body falling freely | (p) displacement |
(B) Distance with direction | (q) velocity |
(C) Speed with direction | (r) acceleration |
(D) Rate of change of velocity | (s) uniformly accelerated motion |
Answer : (A → s), (B → p), (C → q), (D → r)
CLOUMN-I | COLUMN-II |
(A) Wide straps of school bags | (p) motion of planets around the sun. |
(B) Archimedes principle | (q) weight of an object |
(C) Gravitational force | (r) submarine |
(D) Upthrust | (s) balloons |
(t) to reduce pressure |
Answer : (A → t), (B → r, s), (C → p, q) (D → r, s)
CLOUMN-I | COLUMN-II |
(A) Loss in weight | (p) gravitational force |
(B) Motion of moon around the earth | (q) upthrust |
(C) Airship | (r) increasing pressure |
(D) Sharp tip of a needle | (s) archimedes principle |
(t) centripetal force |
Answer : (A → q, s), (B → p,t), (C → q, s), (D → r)
MARK THE STATEMENT TRUE OR FALSE :
Question. The force of attraction between two bodies is called gravity.
Answer : False
Question. The value of G depends upon the mass of two objects.
Answer : True
Question. If a spring balance, holding a heavy object is released, it will read zero weight.
Answer : True
Question. The value of G is high if the radius of the body is more and less if radius is less.
Answer : True
Question. The centre of mass and centre of gravity for a small body lie at the same point.
Answer : True
Question. The gravitational force between two bodies changes if a material body is placed between them.
Answer : False
Question. The acceleration of a body thrown up is numerically the same as the acceleration of a downward falling body but opposite is sign.
Answer : True
Question. The value of g is zero at the centre of the earth.
Answer : True
Question. The inertia of an object depends upon its mass.
Answer : True
Question. All objects attract each other along the line joining their centre of mass.
Answer : True
Question. Acceleration due to gravity, g = 2 GMR , where symbols have their usual meanings.
Answer : True
Question. Relative density has no unit.
Answer : True
Question. Archimedes' principle does not apply to gases.
Answer : False
Question. Any solid will sink in water if its relative density is less than unity.
Answer : False
FILL IN THE BLANKS :
Question. .................... is the force of attraction between any two bodies in the universe.
Answer : gravitation
Question. .................... is the force of attraction between a body and a planet.
Answer : gravity
Question. Acceleration due to gravity .................... with height from the surface of the earth.
Answer :decreases
Question. Acceleration due to gravity .................... with depth from the surface of the earth.
Answer : decreases
Question. Acceleration due to gravity is a maximum at the ....................
Answer : poles
Question. .................... of a body changes from place to place but its .................... remains constant.
Answer : weight, mass
Question. The upward force experienced by a body immersed partially or fully in a fluid is called ....................
Answer : buoyant force
Question. Density of a substance is defined as the ratio of the mass of a body to its ....................
Answer : volume
Question. Relative density of a substance is defined as the ratio of the density of the substance to the density of water at ....................
Answer : 4°C
Question. In cgs the relative density of a substance is .................... equal to its density in gcm–3.
Answer : numerically
Question. The combined weight of the sinker and cork is .................... than the weight of the sinker alone.
Answer : less
Question. For a body to float the density of the floating object should be .................... than or equal to the density of the liquid in which it is to float.
Answer : less
Question. The centre of .................... is a point, where the total upthrust, due to fluid displaced by part .................... of body acts.
Answer : buoyancy, the immersed
Question. A fish .................... by squeezing out air, from its ....................
Answer : dives, floating tube
Question. When a body is partly or wholly immersed in a .................... , it experience an ....................
Answer : fluid, upthrust
Question. An iceberg floats with .................... of its volume below ....................
Answer : 11/12, water
Question. The unit of upthrust in SI is ....................
Answer : Newton
Question. Lactometer is used to measure ................... of ....................
Answer : purity, milk
Question. A hydrometer sinks .................... in water than in pure milk.
Answer : more
Question. The density of hot air is .................... that of cold air.
Answer : less than
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