# CBSE Class 12 Physics Gravitation MCQs

Refer to CBSE Class 12 Physics Gravitation MCQs provided below. CBSE Class 12 Physics MCQs with answers available in Pdf for free download. The MCQ Questions for Class 12 Physics with answers have been prepared as per the latest syllabus, CBSE books and examination pattern suggested in Class 12 by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 8 Electromagnetic Waves are an important part of exams for Class 12 Physics and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 12 Physics and also download more latest study material for all subjects

## MCQ for Class 12 Physics Chapter 8 Electromagnetic Waves

Class 12 Physics students should refer to the following multiple-choice questions with answers for Chapter 8 Electromagnetic Waves in Class 12. These MCQ questions with answers for Class 12 Physics will come in exams and help you to score good marks

### Chapter 8 Electromagnetic Waves MCQ Questions Class 12 Physics with Answers

Question: If a rock is brought from the surface of the moon,

(A) its mass will change
(B) its weight will change but not mass
(C) both mass and weight will change
(D) its mass and weight both will remain same

Question: A body is weighed at the poles and then at the equator. The weight
(A) at the equator will be greater than at the poles
(B) at the poles will be greater than at the equator
(C) at the poles will be equal to the weight at the equator
(D) depends upon the object

Question: Consider a satellite going round the earth in a circular orbit. Which of the following statements is wrong ?
(A) It is a freely falling body.
(B) It is moving with constant speed.
(C) It is acted upon by a force directed away from the centre of the earth which counter-balances the gravitational pull
(el) Its angular momentum remains constant

Question: A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energy is
(A) positive
(B) negative
(C) zero
(D) may be positive or negative depending upon its initial velocity

Question: SI unit of g is
(A) m2/s
(C) s/m2
(B) m/s
(D) m/s

Question: SI unit of G is
(A) N2–m2/kg
(B) N–m2/kg
(C) N–m/kg
(D) N -m2/kg2

Question: Choose the correct statement of the following:
(A) All bodies repel each other in this universe.
(B) Our earth does not behave like a magnet.
(C) Acceleration due to gravity is 8.9 m/s2.
(D) All bodies fall at the same rate in vacuum.

Question: Maximum weight of a body is
(A) at the centre of the earth
(B) inside the earth
(C) on the surface of the earth
(D) above the surface of earth

Question: If the distance between two masses be doubled, then the force between them will become
(A) 1/4 times
(B) 4 times
(C) 1/2 times
(D) 2 times

Question: A body falls freely towards the earth with
(A) uniform speed
(B) uniform velocity
(C) uniform acceleration
(D) none of these

Question: If the mass of a body is M on the sufrace of the earth, then its mass on the surface of the moon will be
(A) M/6
(B) M
(C) M + 6
(D) zero

Question: Weight
(A) is a vector quantity
(B) of a body in interplanetary space is maximum
(C) increases when the bodies go up
(D) none of these

Question: The value of g near the earth's surface is
(A) 8.9 m/s2
(B) 8.9 m/s
(C) 9.8 m/s2
(el) 9.8 m/s

Question: A geostationary satellite
(A) moves faster than the near earth satellite
(B) has a time period less that of a near earth satellite
(C) revolves about the polar axis
(D) is stationary in space

Question: The force of gravitation between two bodies depend upon
(A) their separation
(B) gravitational constant
(C) product of their masses
(D) all of these

Question: When an object is thrown up, the force of gravity
(A) acts in the direction of the motion
(B) acts in the opposite direction of the motion
(C) remains constant as the body moves up
(D) increases as the body moves up

Question: The force of gravitation exists
(A) everywhere in the universe
(B) at the surface of the earth only
(C) inside the earth only
(D) at the surface of the moon only

Question: 1 kg wt is equal to
(A) 9.8 N
(B) 980N
(C) 98 N
(D) none of these

Question: 1 kg wt is equal to
(A) 980 dynes
(B) 9.80 dynes
(C) 98 dynes
(D) none of these

Question: The value of G does not depend on
(A) nature of the interacting bodies
(B) size of the interacting bodies
(C) mass of the interacting bodies
(D) all of these

SINGLE COLUMN (MATRIX)

 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.

Question. The value of G depends upon the mass of two objects.

Question. If a spring balance, holding a heavy object is released, it will read zero weight.

Question. The value of G is high if the radius of the body is more and less if radius is less.

Question. The centre of mass and centre of gravity for a small body lie at the same point.

Question. The gravitational force between two bodies changes if a material body is placed between them.

Question. The acceleration of a body thrown up is numerically the same as the acceleration of a downward falling body but opposite is sign.

Question. The value of g is zero at the centre of the earth.

Question. The inertia of an object depends upon its mass.

Question. All objects attract each other along the line joining their centre of mass.

Question. Acceleration due to gravity, g = 2 GMR , where symbols have their usual meanings.

Question. Relative density has no unit.

Question. Archimedes' principle does not apply to gases.

Question. Any solid will sink in water if its relative density is less than unity.

FILL IN THE BLANKS :

Question. .................... is the force of attraction between any two bodies in the universe.

Question. .................... is the force of attraction between a body and a planet.

Question. Acceleration due to gravity .................... with height from the surface of the earth.

Question. Acceleration due to gravity .................... with depth from the surface of the earth.

Question. Acceleration due to gravity is a maximum at the ....................

Question. .................... of a body changes from place to place but its .................... remains constant.

Question. The upward force experienced by a body immersed partially or fully in a fluid is called ....................

Question. Density of a substance is defined as the ratio of the mass of a body to its ....................

Question. Relative density of a substance is defined as the ratio of the density of the substance to the density of water at ....................

Question. In cgs the relative density of a substance is .................... equal to its density in gcm–3.

Question. The combined weight of the sinker and cork is .................... than the weight of the sinker alone.

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.

Question. The centre of .................... is a point, where the total upthrust, due to fluid displaced by part .................... of body acts.

Question. A fish .................... by squeezing out air, from its ....................

Question. When a body is partly or wholly immersed in a .................... , it experience an ....................

Question. An iceberg floats with .................... of its volume below ....................

Question. The unit of upthrust in SI is ....................

Question. Lactometer is used to measure ................... of ....................

Question. A hydrometer sinks .................... in water than in pure milk.

Question. The density of hot air is .................... that of cold air.

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