Students can solve these MCQ Questions for Class 11 Physics with Answers and evaluate their preparation level. Class 11 Physics MCQ Questions of Gravitation with Answer are set up according to the Latest Exam Pattern and syllabus. These Class 11 MCQ Questions of Gravitation with answers clear for a speedy correction of the Chapter.
Gravitation is one of the key powers of attraction that exists between objects. Newton is the unit of gravitation force. To help you in an exam, here could be a list of MCQ questions for class 11 Gravitation with Answers.
Practice MCQ Questions for class 11 Physics Chapter-Wise
1. 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
2. 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
3. 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
4. Who among the following first gave the experimental velocity of G?
(a) Cavendish
(b) Copernicus
(c) Brook Taylor
(d) none of these
5. 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
6. In planetary motion
(a) the total angular momentum remains constant
(b) the linear speed remains constant
(c) neither the angular momentum nor angular speed remains constant
(d) the angular speed remains constant
7. 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
8. 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
9. 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
10. 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
11. Where will it be profitable to purchase one kilogram sugar?
(a) At equator
(b) At 40° latitude
(c) At poles
(d) At 45° latitude
12. 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
13. Average density of the earth
(a) is directly proportional to g
(b) is inversely proportional to g
(c) does not depend on g
(d) is a complex function of g
14. If the earth were to rotates faster than its present speed, the weight of an object will
(a) decrease at the equator but remain unchanged at the poles
(b) remain unchanged at the equator but decrease at the poles
(c) remain unchanged at the equator but increase at the poles
(d) increase at the equator but remain unchanged at the poles
15. At what height from the ground will the value of g be the same as that in 10 km deep mine below the surface of earth?
(a) 5 km
(b) 15 km
(c) 10 km
(d) 20 km
16. Consider Earth to be a homogeneous sphere. Scientist A goes deep down in a mine and scientist B goes high up in a balloon. The gravitational field measured by
(a) each decreases at different rates
(b) each decreases at the same rate
(c) B goes on decreasing and that by A goes on increasing
(d) A goes on decreasing and that by B goes on increasing
17. In some region, the gravitational field is zero. The gravitational potential in this region.
(a) must be constant
(b) may be zero
(c) must be variable
(d) cannot be zero
18. In a gravitational field, at a point where the gravitational potential is zero
(a) the gravitational field is necessarily zero
(b) the gravitational field is not necesarily zero
(c) any value between one and infinite
(d) None of these
19. A planet is moving in an elliptical orbit. If T, V, E, and L stand, respectively, for its kinetic energy, gravitational potential energy, total energy and angular momentum about the center of orbit, then
(a) T is conserved
(b) V is always positive
(c) E is always negative
(d) None of these
20. If 'A' is areal velocity of a planet of mass M, its angular momentum is
(a) M/A
(b) 2MA
(c) A2M
(d) AM2
21. Kepler's second law regarding constancy of the areal velocity of a planet is a consequence of the law of conservation of:
(a) Energy
(b) Linear momentum
(c) Angular momentum
(d) Mass
22. Weightlessness experienced while orbiting the earth in space-ship, is the result of
(a) Inertia
(b) Acceleration
(c) Zero gravity
(d) Freefall towards the earth
23. The time period of a simple pendulum on a freely moving artificial satellite is
(a) Zero
(b) 2 sec
(c) 3 sec
(d) Infinite
24. A body of mass m is taken to the bottom of a deep mine. Then
(a) Its mass increases
(b) Its mass decreases
(c) Its weight increases
(d) Its weight decreases
25. If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct ?
(a) g' on the Earth will not change.
(b) Raindrops will fall faster
(c) Time period of a simple pendulum on the Earth would decrease.
(d) Walking on the ground would become more difficult.