MCQ Gravitation | NCERT Class 9 Science

#1. As per law of gravitation, the gravitational force acts between

a) the earth & the sun only

b) the earth & a point mass only

c) two charged bodies only

d) any two bodies which have some mass

#2. The gravitational force between two objects is F. If masses of both objects are halved without changing the distance between them, then the gravitational force would become

a) F/4

b) F/2

c) F

d) 2F

#3. An object is put one by one in three liquids having different densities. The object floats 1/9, 2/11 & 3/7 parts of their volumes outside the liquid surface in liquids of densities d₁, d₂, d₃ respectively. Which of the following statement is correct?

a) d₁> d₂> d₃

b) d₁> d₂< d₃

a) d₁< d₂> d₃

a) d₁< d₂< d₃

#4. An object weighs 10 N in air. When immersed fully in water, it weighs only 8 N. The weight of the liquid displaced by the object will be

a) 12 N

b) 2 N

c) 8 N

d) 10 N

#5. The force of attraction between two-unit point masses separated by a unit distance is called

a) gravitational potential

b) acceleration due to gravity

c) gravitational field

d) universal gravitational constant

#6. In the relation F=GMm/d², the quantity G

a) depends on the value of g at the place of observation

b) is used only when the Earth is one of the two masses

c) is greatest at the surface of the earth

d) is universal constant of nature

#7. Two objects of different masses falling freely near the surface of moon would

a) have different accelerations

b) experience forces of same magnitude

c) undergo a change in their inertia

d) have same velocities at any instant

#8. The value of acceleration due to gravity

a) is least on equator

b) is least on poles

c) increases from pole to equator

d) is same on equator & poles

#9. A girl stands on a box having 60 cm length, 40 cm breadth & 20 cm width in three ways. In which of the following cases pressure exerted by the brick will be

a) maximum when length & breadth form the base

b) maximum when breadth & width form the base

c) maximum when width & length form the base

d) the same in all the above cases

#10. A boy is whirling a stone tied with a string in a horizontal circular path. If the string breaks, the stone

a) will move along a straight line tangential to the circular path

b) will move along a straight line perpendicular to the circular path away from the boy

c) will move along a straight line towards the center of the circular path

d) will continue to move in the circular path

#11. Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be

a) 1/4 times

b) 4 times

c) 1/2 times

d) unchanged

#12. The value of quantity G in the law of gravitation

a) depends on mass of the Earth only

b) depends on radius of the Earth only

c) depends on both mass & radius of the Earth

d) is independent of both mass & radius of the Earth

#13. What will be the weight of an object at the Centre of the Earth of radius R

a) infinite

b) zero

c) R times the weight at the surface of the Earth

d) 1/R² times the weight at the surface of the Earth

#14. The atmosphere is held to the Earth by

a) wind

b) clouds

c) gravity

d) magnetic of the Earth

#15. An apple falls from a tree because of gravitational attraction between the Earth & apple. If F₁ is the magnitude of force exerted by the Earth on the apple & F₂ is the magnitude of force exerted by apple on Earth, then

a) F₁ >> F₂

b) F₂ >> F₁

c) F₁ > F₂

d) F₁ = F₂

#16. The weight of a body felt in tap water & salty water are W_A & W_B respectively, then

a) W_A = W_B

b) W_A > W_B

c) W_A < W_B

d) W_A = 2 W_B

Finish

Results

Congratulations. You scored above 60%.

Better luck next time. You scored below 60%.

M	T	W	T	F	S	S
						1
2	3	4	5	6	7	8
9	10	11	12	13	14	15
16	17	18	19	20	21	22
23	24	25	26	27	28

MCQ & Online Test – Gravitation – NCERT Class 9 Science Chapter 10

Online Test | MCQ Gravitation | NCERT Class 9 Science Chapter 10 | CBSE Syllabus

#1. As per law of gravitation, the gravitational force acts between

#2. The gravitational force between two objects is F. If masses of both objects are halved without changing the distance between them, then the gravitational force would become

#3. An object is put one by one in three liquids having different densities. The object floats 1/9, 2/11 & 3/7 parts of their volumes outside the liquid surface in liquids of densities d₁, d₂, d₃ respectively. Which of the following statement is correct?

#4. An object weighs 10 N in air. When immersed fully in water, it weighs only 8 N. The weight of the liquid displaced by the object will be

#5. The force of attraction between two-unit point masses separated by a unit distance is called

#6. In the relation F=GMm/d², the quantity G

#7. Two objects of different masses falling freely near the surface of moon would

#8. The value of acceleration due to gravity

#9. A girl stands on a box having 60 cm length, 40 cm breadth & 20 cm width in three ways. In which of the following cases pressure exerted by the brick will be

#10. A boy is whirling a stone tied with a string in a horizontal circular path. If the string breaks, the stone

#11. Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be

#12. The value of quantity G in the law of gravitation

#13. What will be the weight of an object at the Centre of the Earth of radius R

#14. The atmosphere is held to the Earth by

#15. An apple falls from a tree because of gravitational attraction between the Earth & apple. If F₁ is the magnitude of force exerted by the Earth on the apple & F₂ is the magnitude of force exerted by apple on Earth, then

#16. The weight of a body felt in tap water & salty water are W_A & W_B respectively, then

Results

Online Test | MCQ Gravitation | NCERT Class 9 Science Chapter 10 | CBSE Syllabus

#1. As per law of gravitation, the gravitational force acts between

#2. The gravitational force between two objects is F. If masses of both objects are halved without changing the distance between them, then the gravitational force would become

#3. An object is put one by one in three liquids having different densities. The object floats 1/9, 2/11 & 3/7 parts of their volumes outside the liquid surface in liquids of densities d1, d2, d3 respectively. Which of the following statement is correct?

#4. An object weighs 10 N in air. When immersed fully in water, it weighs only 8 N. The weight of the liquid displaced by the object will be

#5. The force of attraction between two-unit point masses separated by a unit distance is called

#6. In the relation F=GMm/d2, the quantity G

#7. Two objects of different masses falling freely near the surface of moon would

#8. The value of acceleration due to gravity

#9. A girl stands on a box having 60 cm length, 40 cm breadth & 20 cm width in three ways. In which of the following cases pressure exerted by the brick will be

#10. A boy is whirling a stone tied with a string in a horizontal circular path. If the string breaks, the stone

#11. Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be

#12. The value of quantity G in the law of gravitation

#13. What will be the weight of an object at the Centre of the Earth of radius R

#14. The atmosphere is held to the Earth by

#15. An apple falls from a tree because of gravitational attraction between the Earth & apple. If F1 is the magnitude of force exerted by the Earth on the apple & F2 is the magnitude of force exerted by apple on Earth, then

#16. The weight of a body felt in tap water & salty water are WA & WB respectively, then

Results

#3. An object is put one by one in three liquids having different densities. The object floats 1/9, 2/11 & 3/7 parts of their volumes outside the liquid surface in liquids of densities d₁, d₂, d₃ respectively. Which of the following statement is correct?

#6. In the relation F=GMm/d², the quantity G

#15. An apple falls from a tree because of gravitational attraction between the Earth & apple. If F₁ is the magnitude of force exerted by the Earth on the apple & F₂ is the magnitude of force exerted by apple on Earth, then

#16. The weight of a body felt in tap water & salty water are W_A & W_B respectively, then