MCQ Questions for Class 11 Physics Chapter 8 Gravitation with Answers

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 8 Gravitation with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Gravitation Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

Class 9 Physics Chapter 8 MCQ With Answers

Physics Class 9 Chapter 8 MCQs On Gravitation

Gravitation Class 11 MCQ Question 1.
The radius of the earth is 6400 km and g = 10 m/s². In order that a body of 5 kg weighs zero at the equator, the angular speed of the earth is
(a) 1/80 rad /s
(b) 1/400 rad /s
(c) 1/800 rad /s
(d) 1/1600 rad /s

Answer

Answer: (c) 1/800 rad /s

Gravitation MCQ Class 11 Question 2.
A body weighs 500 N on the surface of the earth. How much would it weight half way below the surface of the earth?
(a) 1000 N
(b) 500 N
(c) 250 N
(d) 125 N

Answer

Answer: (c) 250 N

MCQ Questions On Gravitation For Class 11 Question 3.
The time – period of a satellite of earth is 5 hours. If the separation between the earth and the satellite is increased to 4 times the previous value, the new time – period will become
(a) 10 hours
(b) 20 hours
(c) 40 hours
(d) 80 hours

Answer

Answer: (c) 40 hours

Class 11 Gravitation MCQ Question 4.
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

Answer

Answer: (b) Negative

MCQ On Gravitation Class 11 Question 5.
What would be the duration of the year if the distance between the earth and the sun gets doubled?
(a) 1032 days
(b) 129 days
(c) 365 days
(d) 730 days

Answer

Answer: (a) 1032 days

MCQ Of Gravitation Class 11 Question 6.
If a body of mass m is taken out from a point below the surface of earth equal to half the radius of earth, R, to a height R above the earths surface, then work done on it will be
(a) (5/6) mgR
(b) (6/7) mgR
(c) (7/8) mgR
(d) (8/9) mgR

Answer

Answer: (c) (7/8) mgR

Class 11 Physics Chapter 8 MCQ Question 7.
A artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy E0. Its potential energy is
(a) 2E0
(b) E0
(c) 1.5 E0
(d) -E0

Answer

Answer: (a) 2E0

Class 11 Physics Gravitation MCQ Question 8.
A body is projected vertically from the surface of the earth of radius R with velocity equal to half of the escape velocity. The maximum height reached by the body is
(a) R
(b) R/2
(c) R/3
(d) R/4

Answer

Answer: (c) R/3

MCQ Questions For Class 11 Physics Chapter 8 Question 9.
The escape velocity for a body projected vertically upwards from the surface of the earth is 11 km/s. If the body is projected at an angle of 450 with the vertical, the escape velocity will be
(a) 11/√2 km/s
(b) 11√2 km/s
(c) 2 km/s
(d) 11 km/s

Answer

Answer: (d) 11 km/s

MCQ Questions On Gravitation For Class 11 With Solutions Question 10.
There is no atmosphere on the moon because
(a) it is closer to the earth
(b) it revolves round the earth
(c) it gets light from the sun
(d) the escape velocity of gas molecules is less than their root mean square velocity here

Answer

Answer: (d) the escape velocity of gas molecules is less than their root mean square velocity here

Gravitation MCQs With Answers Pdf Class 11 Question 11.
The value of g at a particular point is 9.8 m/sec² suppose the earth suddenly shrink uniformly to half its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not shrink) will become
(a) 9.8 m/sec²
(b) 4.9 m/sec²
(c) 19.6 m/sec²
(d) 2.45 m/sec²

Answer

Answer: (a) 9.8 m/sec²

MCQs On Gravitation Class 11 Question 12.
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

Answer

Answer: (b) Negative

MCQ Gravitation Class 11 Question 13.
If the radius of the earth were to be raise by 1% its mass remaining the same, the acceleration due to gravity on the surface of the earth will
(a) increase by 1%
(b) decrease by 2%
(c) decrease by 1%
(d) increase by 2%

Answer

Answer: (d) increase by 2%

MCQ On Gravitation For Class 11 Pdf Question 14.
A body is projected vertically from the surface of the earth of radius R with velocity equal to half of the escape velocity. The maximum height reached by the body is
(a) R
(b) R/2
(c) R/3
(d) R/4

Answer

Answer: (c) R/3

Class 11 Physics Ch 8 MCQ Question 15.
The escape velocity of projection from the earth is approximately (R = 6400 km)
(a) 7 km/sec
(b) 112 km/sec
(c) 12.2 km/sec
(d) 1.1 km/sec

Answer

Answer: (c) 12.2 km/sec

MCQ Of Chapter Gravitation Class 11 Question 16.
Who among the following first gave the experimental velocity of G?
(a) Cavendish
(b) Copernicus
(c) Brook Taylor
(d) none of these

Answer

Answer: (a) Cavendish

Gravitation Class 11 MCQs Question 17.
A satellite S is move in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth .
(a) The acceleration of S is always directed towards the centre of the earth.
(b) The angular momentum of S about the centre of the earth changes in direction, but its magnitude remains constant.
(c) The total mechanical energy of S varies periodically with time.
(d) The linear momentum of S remains constant in magnitude.

Answer

Answer: (a) The acceleration of S is always directed towards the centre of the earth.

Ch 8 Physics Class 11 MCQ Question 18.
The mean radius of the earth is R, its angular speed on its own axis is w and the acceleration due to gravity at earths surface is g. The cube of the radius of the orbit of a geo-stationary satellite will be
(a) r²g / w
(b) R²w²/ g
(c) RG w²
(d) R²g / w²

Answer

Answer: (d) R²g / w²

Chapter 8 Physics Class 11 MCQs Question 19.
If the distance between the earth and the sun were half its present value, the number of day in a year would have been
(a) 64.5
(b) 129
(c) 182.5
(d) 730

Answer

Answer: (b) 129

Gravitation Class 11 MCQ Questions Question 20.
The masses of two planets are in the ratio 1 : 2. Their radii are in the ratio 1 : 2. The acceleration due to gravity on the planets are in the ratio.
(a) 1 : 2
(b) 2 : 1
(c) 3 : 5
(d) 5 : 3

Answer

Answer: (a) 1 : 2

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