MCQ Questions for Class 11 Physics Chapter 8 Gravitation with Answers

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.


Q1. 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

(c) 1/800 rad /s


Q2. 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

(c) 250 N


Q3. 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

(c) 40 hours


Q4. 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

(b) Negative


Q5. 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

(a) 1032 days


Q6. 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

(c) (7/8) mgR


Q7. 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

(a) 2E0


Q8. 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

(c) R/3


Q9. 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

(d) 11 km/s


Q10. 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

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


Q11. 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

(a) 9.8 m/sec²


Q12. Kepler’s second law may be stated as “under the influence of central force, in equal interval of time, position vector sweeps out equal

a) area
b) None of these
c) distance
d) dispalacement

a) area


Q13. If the distance of earth is halved from the sun, then the no. of days in a year will be

a) 129
b) 730
c) 182.5
d) 365

a) 129


Q14. If the earth is at one-fourth of its present distance from the sun, the duration of the year will be

a) one-eighth the present year
b) one-sixth the present year
c) one-tenth the present year
d) half the present year

a) one-eighth the present year


Q15. Newton’s universal law of gravitation applies to

a) both small and big bodies
b) only valid for solar system
c) planets only
d) small bodies only

a) both small and big bodies


Q16. The value of G varies with

a) None of these
b) radius of the planet
c) depth below the ground
d) height above the earth’s surface

a) None of these


Q17. Force of gravitational attraction is least

a) at the equator
b) at the poles
c) at a point in between equator and any pole
d) None of these

a) at the equator


Q18. Assertion : If earth suddenly stops rotating about its axis, then the value of acceleration due to gravity will become same at all the places.
Reason : The value of acceleration due to gravity depends upon the rotation of the earth.

a) Assertion is correct, reason is incorrect
b) Assertion is incorrect, reason is correct
c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

a) Assertion is correct, reason is incorrect


Q19. The height of the point vertically above the earth’s surface, at which acceleration due to gravity becomes 1% of its value at the earth’s surface is (Radius of the earth = R)

a) 9 R
b) 10 R
c) 20 R
d) 8 R

a) 9 R


Q20. The speed of earth’s rotation about its axis is w. Its speed is increases to x times to make the effective acceleration due to gravity equal to zero at the equator. Then x is

a) 17
b) 34
c) 8.5
d) 1

a) 17


Q21. Where will it be profitable to purchase one kilogram sugar?

a) At equator
b) At 40° latitude
c) At poles
d) At 45° latitude

a) At equator


Q22. Earth is flattened at poles, bulged at the equator. This is due to

a) the centrifugal force is more at the equator than at the poles
b) the angular velocity of spinning about its axis is more at equator
c) the angular velocity of spinning about its axis is less at equator
d) earth revolves round the sun in an elliptical orbit

a) the centrifugal force is more at the equator than at the poles


Class 11 Physics MCQs Questions with Answers Chapter Wise PDF Download


We hope the given NCERT MCQ Questions for Class 11 Physics Chapter 8 Gravitation with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 11 Physics Gravitation MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

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