Here we will provide you the 50+ MCQ Questions of Gravitation for NEET-UG. Gravitation is the chapter 8 in Class XI or Class 11 Physics NCERT Unit Gravitation NEET (conducted by NTA) is based on the NCERT book.
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Gravitation NEET MCQ
Two identical spherical planets, A and B, have radii in the ratio 2:3. If the acceleration due to gravity on planet A is g, then the acceleration due to gravity on planet B is:
a) (2/3)g
b) (3/2)g
c) g/2
d) 2g/3
A particle is projected with a velocity v from a point on the surface of a planet of mass M and radius R. If the escape velocity is vE, then the velocity at a height equal to half the radius of the planet is:
a) v/2
b) vE/2
c) vE/√2
d) v/√2
Two identical masses M are located at a distance 2R apart. A third mass m is placed on the line joining the two masses at a distance R from each. The gravitational force on the third mass due to the other two masses is:
a) (GmM)/2R^2
b) (GmM)/R^2
c) 0
d) (GmM)/4R^2
A uniform spherical shell of mass M and radius R is released from rest in a gravitational field. The speed of the center of mass of the shell when it reaches the ground is:
a) √(2GM/R)
b) √(GM/R)
c) √(GM/2R)
d) √(GM/4R)
A particle of mass m moves in a circular orbit around a planet of mass M and radius R. If the gravitational force on the particle is F, then the speed of the particle is:
a) F/√(mM)
b) F/√(2mM)
c) √(F/2m)
d) √(F/m)
A planet has a moon in a circular orbit of radius r and period T. If the mass of the planet is doubled while the mass of the moon remains the same, the new period of the moon’s orbit is:
a) T/2
b) T√2
c) T
d) T/√2
Two identical small spheres each of mass m are released from rest in a uniform gravitational field. One sphere is released from a height h above the ground and the other sphere is released from the ground. The time taken by the spheres to reach the ground is:
a) √(2h/g)
b) √(2h/3g)
c) √(h/g)
d) √(h/2g)
A planet has a moon in a circular orbit of radius r and period T. If the mass of the planet is halved while the mass of the moon remains the same, the new period of the moon’s orbit is:
a) T/2
b) T√2
c) T
d) T/√2
A small object of mass m is released from rest at a distance R from the center of a planet of mass M and radius R. The object falls towards the planet and eventually collides with the surface. The work done by the gravitational force on the object during its fall is:
a) -(GMm)/2R
b) -(GMm)/R
c) -(GMm)/4R
d) -(GMm)/8R
A satellite is in a circular orbit of radius R around the Earth. If the radius of the Earth is increased by a factor of 3, then the speed of the satellite in its new orbit is:
a) √3 times its original value
b) 3 times its original value
c) √(1/3) times its original value
d) 1/3 times its original value
Two planets A and B have masses in the ratio 3:5 and radii in the ratio 5:3. The acceleration due to gravity on planet A is g. The acceleration due to gravity on planet B is:
a) (3/5)g
b) (5/3)g
c) 9g/25
d) 25g/9
Two particles of masses M and m (M > m) are separated by a distance r. The gravitational force on a third particle of mass m placed at a distance R from the center of mass of the system is:
a) (GMm)/(R^2 + r^2/4)
b) (GMm)/(R^2 + r^2)
c) (GMm)/(R^2 + r^2/2)
d) (GMm)/(R^2 + r^2/8)
A small object of mass m is released from rest at a height h above the surface of a planet of mass M and radius R. The work done by the gravitational force on the object during its fall to the surface is:
a) -(GMm)/R
b) -(GMm)/(2R)
c) -(GMm)/(3R)
d) -(GMm)/(4R)
Two planets of mass M and 2M have radii in the ratio 2:1. The acceleration due to gravity on the surface of the smaller planet is g. The acceleration due to gravity on the surface of the larger planet is:
a) g/2
b) g
c) 2g
d) 4g
A small object of mass m is placed at a distance r from a planet of mass M and radius R. If the object is given a small horizontal velocity, it will execute simple harmonic motion if:
a) r is greater than 2R
b) r is less than 2R
c) r is greater than R
d) r is less than R
A small object of mass m is placed at a distance r from a planet of mass M and radius R. If the object is given a small horizontal velocity greater than the escape velocity, it will:
a) move in a circular orbit around the planet
b) move in an elliptical orbit around the planet
c) escape from the gravitational field of the planet
d) move in a hyperbolic orbit around the planet
Two particles of masses M and m (M > m) are separated by a distance r. The gravitational potential energy of the system is minimum when the third particle of mass m is placed at a distance from the center of mass of the system equal to:
a) r/3
b) r/2
c) r
d) 2r/3
A planet has a mass M and radius R. A satellite of mass m revolves around it in a circular orbit of radius r. The speed of the satellite is v. The gravitational force acting on the satellite due to the planet is:
a) (GMm)/(R^2)
b) (GMm)/(r^2)
c) mv^2/r
d) mv^2/R
A small object of mass m is released from rest at a height h above the surface of a planet of mass M and radius R. The maximum height reached by the object is:
a) h/2
b) h/3
c) h/4
d) h/5
Two identical spheres of mass M are placed at a distance d apart. The gravitational force between them is F. If the mass of each sphere is increased by a factor of 4, and the distance between them is increased by a factor of 2, then the gravitational force between them will be:
a) F/32
b) F/16
c) F/8
d) F/4
Two masses m and 4m are placed at a distance 2d apart. The gravitational potential energy of the system is U. If the distance between the masses is increased to 4d, then the gravitational potential energy of the system will be:
a) U/8
b) U/4
c) U/2
d) 2U
A planet has a mass M and radius R. A satellite of mass m revolves around it in an elliptical orbit. The speed of the satellite is maximum when it is:
a) closest to the planet
b) farthest from the planet
c) at the midpoint of its orbit
d) none of the above
Two masses M and m are separated by a distance r. The gravitational force on a third particle of mass m placed at a distance R from the center of mass of the system is proportional to:
a) R^2
b) R^3
c) 1/R^2
d) 1/R^3
A small object of mass m is placed at a distance r from a planet of mass M and radius R. If the object is given a small horizontal velocity greater than the escape velocity, it will:
a) move in a circular orbit around the planet
b) move in an elliptical orbit around the planet
c) escape from the gravitational field of the planet
d) move in a hyperbolic orbit around the planet
Two particles of masses M and m (M > m) are separated by a distance r. The gravitational potential energy of the system is minimum when the third particle of mass m is placed at a distance from the center of mass of the system equal to:
a) r/3
b) r/2
c) r
d) 2r/3
A planet has a mass M and radius R. A satellite of mass m revolves around it in a circular orbit of radius r. The speed of the satellite is v. The gravitational force acting on the satellite due to the planet is:
a) (GMm)/(R^2)
b) (GMm)/(r^2)
c) mv^2/r
d) mv^2/R
A small object of mass m is released from rest at a height h above the surface of a planet of mass M and radius R. The maximum height reached by the object is:
a) h/2
b) h/3
c) h/4
d) h/5
Two identical spheres of mass M are placed at a distance d apart. The gravitational force between them is F. If the mass of each sphere is increased by a factor of 4, and the distance between them is increased by a factor of 2, then the gravitational force between them will be:
a) F/32
b) F/16
c) F/8
d) F/4
Two masses m and 4m are placed at a distance 2d apart. The gravitational potential energy of the system is U. If the distance between the masses is increased to 4d, then the gravitational potential energy of the system will be:
a) U/8
b) U/4
c) U/2
d) 2U
A planet has a mass M and radius R. A satellite of mass m revolves around it in an elliptical orbit. The speed of the satellite is maximum when it is:
a) closest to the planet
b) farthest from the planet
c) at the midpoint of its orbit
d) none of the above
Two masses M and m are separated by a distance r. The gravitational force on a third particle of mass m placed at a distance R from the center of mass of the system is proportional to:
a) R^2
b) R^3
c) 1/R^2
d) 1/R^3
Two masses M and m (M > m) are separated by a distance r. The gravitational force on a third particle of mass m placed at a distance R from the center of mass of the system is proportional to:
a) R^2
b) R^3
c) 1/R^2
d) 1/R^3
Two identical spheres of mass M are placed at a distance d apart. The gravitational force between them is F. If the distance between them is decreased to d/2, then the gravitational force between them will be:
a) 8F
b) 4F
c) 2F
d) F/2
A planet has a mass M and radius R. A satellite of mass m revolves around it in a circular orbit of radius r. If the gravitational force between the planet and the satellite is halved, the radius of the orbit will become:
a) 2r
b) (2/3)r
c) (1/2)r
d) (1/3)r
Two masses M and m are separated by a distance r. A third particle of mass m is placed at a distance d from mass M, such that d > r. The gravitational force on the third particle due to the system of M and m is:
a) (GmM/d^2) – (GmM/r^2)
b) (GmM/r^2) – (GmM/d^2)
c) (GmM/d^2) + (GmM/r^2)
d) (GmM/r^2) + (GmM/d^2)
Two identical particles of mass m each are separated by a distance r. A third particle of mass M is placed at a distance d from the midpoint of the line joining the two particles. The gravitational force on the third particle due to the two particles is:
a) (GmM/d^2) – (GmM/r^2)
b) (GmM/r^2) – (GmM/d^2)
c) (GmM/d^2) + (GmM/r^2)
d) (GmM/r^2) + (GmM/d^2)
A planet has a mass M and radius R. A satellite of mass m revolves around it in an elliptical orbit. If the speed of the satellite is increased by a factor of 2, the eccentricity of the orbit will:
a) decrease
b) increase
c) remain the same
d) none of the above
A planet has a mass M and radius R. A satellite of mass m revolves around it in a circular orbit of radius r. If the mass of the planet is increased by a factor of 2, the time period of the satellite will:
a) decrease by a factor of 2
b) increase by a factor of 2
c) remain the same
d) decrease by a factor of 4
A planet of mass M and radius R has a satellite of mass m in a circular orbit of radius r. If the gravitational force between the planet and the satellite is reduced to 1/4th its original value, the new radius of the circular orbit will be:
a) 2r
b) 4r
c) r/2
d) r/4
A particle of mass m is projected from the surface of the earth with a velocity v. The maximum height reached by the particle is h. If the gravitational force is decreased by a factor of 3, the maximum height reached by the particle will be:
a) h/3
b) h/2
c) h
d) 2h
Two particles of mass m each are separated by a distance r. A third particle of mass M is placed at a distance d from the midpoint of the line joining the two particles. The gravitational potential energy of the system is:
a) -GmM/r
b) -2GmM/r
c) -GmM/d
d) -2GmM/d
Two particles of masses M and m are separated by a distance r. The gravitational potential energy of the system is U. If the distance between the particles is increased by a factor of 2, the new potential energy of the system will be:
a) U/4
b) U/2
c) 2U
d) 4U
A particle of mass m is released from rest at a distance r from the center of a planet of mass M and radius R. The speed of the particle when it reaches the surface of the planet is:
a) (2GM/R)^0.5
b) (GM/R)^0.5
c) (GM/r)^0.5
d) (2GM/r)^0.5
Two identical particles of mass m each are separated by a distance r. A third particle of mass M is placed at a distance d from the midpoint of the line joining the two particles. The gravitational force on the third particle due to the two particles is:
a) GmM/d^2
b) GmM/r^2
c) GmM/(d-r)^2
d) GmM/(d+r)^2
Two particles of mass m each are separated by a distance d. The gravitational force between them is F. If the mass of one of the particles is increased to 2m, the new gravitational force between the particles will be:
a) 2F
b) 4F
c) F/2
d) F/4
A planet of mass M and radius R has a satellite of mass m in a circular orbit of radius r. If the mass of the satellite is increased by a factor of 4, the new time period of the circular orbit will be:
a) T/4
b) T/2
c) 2T
d) 4T
We hope there NEET MCQ of Class 11 Gravitation will help you to score an excellent rank in NEET-UG. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.
