## Class 11 Physics Objective Chapter – 4 Motion in a Plane

Here we are providing NCERT Class 11 Physics Objective Chapter – 4 Motion in a Plane Chapter Wise MCQs for board exam is very important for board exam preparation. This book explains all the concepts and topics in very simple language that the students can easily understand the complex subjects also. This NCERT Class 11 Physics MCQs Chapter – 4 Motion in a Plane Chapter consist all important topic regarding NCERT Class 11 Physics Objective Chapter – 4 Motion in a Plane. This book basically covers all the major and minor elements that together form a democratic government. Topics like power-sharing, federalism, democracy and diversity, political parties, consequences of democracy, challenges to democracy etc. have been discussed in the NCERT Class 11 Physics Objective Chapter – 4 Motion in a Plane. The question papers in CBSE board exams are generally based on the latest NCERT books. Hence, students must follow the NCERT book to prepare effectively for their Class 11 Physics exam. If you want color notes then click here

Class 11 Physics Objective Chapter – 4 Motion in a Plane

1. Which among the following is a scalar quantity

( a ) Force

( b ) Mass

( c ) Momentum

( d ) Velocity

Ans:- (b)

2. The path followed by a projectile is called its?

( a ) Territory

( b ) Treasury

( c ) Tractor

( d ) Trajectory

Ans:- (d)

3. A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion takes place in a plane. It follows that

( a ) its acceleration is constant

( b ) its motion is circular

( c ) its velocity is constant

( d ) its motion is linear

Ans:- (b)

4. The total flight requires a time that is?

( a ) four times the time necessary to reach the maximum height.

( b ) thrice the time necessary to reach the maximum height

( c ) equal to the time necessary to reach the maximum height.

( d ) twice the time necessary to reach the maximum height

Ans:- (d)

5. A stone is tied to one end of a string. Holding the other end, the string is whirled in a horizontal plane with progressively increasing speed. It breaks at some speed because

( a ) Gravitational forces of the earth are greater than the tension in the string.

( b ) The required centripetal force is greater than the tension sustained by the string.

( c ) The required centripetal force is less than the tension in the string.

( d ) The centripetal force is greater than the weight of the stone.

Ans:- (b)

6. Vectors lying in the same or parallel to the same plane are called ————–

( a ) Coplanar vectors

( b ) Equal vector

( c ) Unit Vector

( d ) Displacement vector

Ans:- (a)

7. A body makes a displacement of 4 m due East from a point O and then makes displacement of 3 m due North. Its resultant displacement from O

( a ) 7 m

( b ) 1 m

( c ) 5 m

( d ) 1 . 2 m

Ans:- (c)

8. A body is moving along a circular path with variable speed, it has

( a ) A radical acceleration

( b ) A tangential acceleration

( c ) Zero acceleration

( d ) Both radical and tangential acceleration

Ans:- (d)

9. Circular motion is a ———–

( a ) Motion in one dimension

( b ) Motion in two dimensions

( c ) Motion in three dimensions

( d ) Motion in four dimensions

Ans:- (b)

10. A body of mass 500 gram is rotating in a vertical circle of radius 1 m. What is the difference in its kinetic energies at the top and the bottom of the circle?

( a ) 4.9 J

( b ) 19.8 J

( c ) 2.8 J

( d ) 9.8 J

Ans:- (d)

11. For a particle performing a U.C.M. the acceleration is

( a ) constant in direction

( b ) constant in magnitude but not in the direction

( c ) constant in magnitude and direction

( d ) constant in neither magnitude nor in direction

Ans:- (b)

12. The angle between centripetal acceleration and tangential acceleration is?

( a ) 180°

( b ) 0°

( c ) 90°

( d ) 45°

Ans:- (c)

13. Which theorem states that “If a particle under the simultaneous action of three forces is in equilibrium, then each force has a constant ratio with the sine of the angle between the other two forces”?

( a ) Lay’s theorem

( b ) Lami’s Theorem

( c ) Newton’s law

Ans:- (b)

14. He dimensional formula for normal acceleration is

( a ) LT-1

( b ) L2T2

( c ) L3T-2

( d ) LT-2

Ans:- (a)

15. Which is the vector that gives the position of a point with reference to a point other than the origin of the coordinate system?

( a ) Coplanar Vectors

( b ) Equal vector

( c ) Unit Vector

( d ) Displacement vector

Ans:- (d)

16. A body is traveling in a circle at constant speed. It

( a ) has an inward acceleration

( b ) has constant velocity.

( c ) has no acceleration

( d ) has an outward radial acceleration

Ans:- (a)

17. A book is pushed with an initial horizontal velocity of 5.0 meters per second off the top of a desk. What is the initial 1 vertical velocity of the book?

( a ) 10. m/s

( b ) 0 m/s

( c ) 50 m/s

( d ) 2.5 m/s

Ans:- (b)

18. One radian is defined to be the angle subtended where the arc length S is exactly equal to the?

( a ) radius of the circle.

( b ) diameter of the circle.

( c ) circumference of the circle.

( d ) half of radius of the circle.

Ans:- (a)

19. Motion in a plane is called ———–

( a ) Motion in one dimension

( b ) Motion in two dimensions

( c ) Motion in three dimensions

( d ) Motion in four dimensions

Ans:- (b)

20. A body travels along the circumference of a circle of radius 2 m with a linear velocity of 6 m/s. Then its angular velocity is

( a ) 6 rad /s

( b ) 3 rad /s

( c ) 2 rad / s

( d ) 4 rad / s

Ans:- (b)

21. A car sometimes overturns while taking a turn. When it overturns, it is

( a ) The inner wheel which leaves the ground first

( b ) The outer wheel which leaves the ground first

( c ) both the wheel leave the ground simultaneously

( d ) Either inner wheel or the outer wheel leaves the ground

Ans:- (a)

22. One° (1°) is equal to?

Ans:- (b)

23. Dot product is distributive, it is given as

( a ) A.(B-C) = A.B*A.C

( b ) A.(B+C) = A.B-A.C

( c ) A.(B+C) = A.B+A.C

( d ) A.(B*C) = A.B/A.C

Ans:- (c)

24. One radian is equal to?

( a ) 57.7°

( b ) 53.7°

( c ) 59.3°

( d ) 57.3°

Ans:- (d)

25. Acceleration due to gravity

( a ) polar vector

( b ) a scalar

( c ) a vector

( d ) None of these

Ans:- (a)

26. A small body attached at the end of an inextensible string completes a vertical circle, then its

( a ) angular momentum remains constant

( b ) linear momentum remains constant

( c ) angular velocity remains constant

( d ) total mechanical energy remains constant

Ans:- (d)

27. A body goes round the circumference of a circle of radius 2 m with an angular velocity of 2 rad/s. Its centripetal acceleration is

( a ) 3 m/s²

( b ) 1 . 5 m/s²

( c ) 6 m/s²

( d ) 12 m/s²

Ans:- (b)

28. When particle revolves with uniform speed on a circular path

( a ) no force acts on it

( b ) no acceleration acts on it

( c ) no work is done by it

( d ) its velocity is constant

Ans:- (c)

29. A body travels along the circumference of a circle of radius 2 m with a linear velocity of 4 m/s. Its centripetal acceleration is

( a ) 8 m/s²

( b ) 16 m/s²

( c ) 10 m/s²

( d ) 4 m/s²

Ans:- (a)

30. The angular velocity depends upon the rate of change of the?

( a ) Angular acceleration

( b ) Angular Distance.

( c ) Angular Displacement.

( d ) torque

Ans :- (c)

31. A cyclist goes round a circular path of circumference 343 m in s. The angle made by him, with the vertical is

( a ) 440

( b ) 420

( c ) 430

( d ) 450

Ans:- (d)

32.  When a body P moves on a circular path, the centripetal acceleration is

( a ) directed inwards from P, to the centre of the circle

( b ) directed tangential to the circumference of the circle, at P

( c ) directed perpendicular to the plane of the circle, at P

( d ) directed outward, perpendicular to the circumference of the circle

Ans:- (a)

33.  How many minimum number of vectors in different planes can be added to give zero resultant?

( a ) 4

( b ) 5

( c ) 3

( d ) 2

Ans:- (a)

34. In a vertical circle of radius r at what point in its path, a particle has a tension equal to zero?

( a ) Highest point

( b ) Lowest point

( c ) Any point

( d ) A horizontal point

Ans:- (a)

35. A body is traveling in a circle at a constant speed. It

( a ) has a constant velocity

( b ) has no acceleration

( c ) has an inward acceleration

( d ) has an outward radial acceleration

Ans:- (c)

36. A book is pushed with an initial horizontal velocity of 5.0 meters per second off the top of a desk. What is the initial vertical velocity of the book?

( a ) 10. m/s

( b ) 0 m/s

( c ) 50 m/s

( d ) 2.5 m/s

Ans:- (b)

37. Which of the following conditions are sufficient and essential for a quantity to be a vector?

( a ) Magnitude, direction, and addition, subtraction multiplication and division by vector laws

( b ) Magnitude, direction and combination of vectors by ordinary rules of algebra

( c ) Magnitude and addition, subtraction, multiplication by ordinary rules of algebra

( d ) Magnitude and direction

Ans:- (a)

38. A particle is performing a U.C.M. Which is the wrong statement regarding its motion?

( a ) The velocity vector is tangential to the circle

( b ) The acceleration vector is tangential to the circle

( c ) The acceleration vector is directed towards the center of the circle

( d ) The velocity and acceleration vectors are perpendicular to each othe

Ans:- (b)

39. A particle has a displacement of 2 units along the x – axis, 1 unit along the y – axis and 2 units along the z – axis. Then the resultant displacement of the particle is

( a ) 3 units

( b ) 5 units

( c ) 4 units

( d ) 1 units

Ans:- (a)

40. A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle? The motion takes place in a plane. It follows that

( a ) its velocity is constant

( b ) its acceleration is constant

( c ) its motion is linear

( d ) its motion is circular

Ans:- (d)

41. A car is moving on a circular path and takes a turn. If R1 and R² are the reactions on the inner and outer wheels respectively, then

( a ) R1 = >R²

( b ) R1 = R²

( c ) R1 < R²

( d ) R1 > R²

Ans:- (c)

42. An airplane is taking a turn in a horizontal plane

( a ) its remains horizontal

( b ) it inclines inward

( c ) it inclines outward

( d ) its wings become vertical

Ans:- (b)

43. The tangential component and centripetal component of acceleration are?

( a ) Similar to each other

( b ) Parallel to each other.

( c ) Equal to each other.

( d ) Perpendicular to each other.

Ans:- (d)

44. When angular velocity changes with respect to time then?

( a ) an angular acceleration is produced

( b ) a linear acceleration is produced

( c ) it constitute a couple

( d ) a linear velocity is produced

Ans:- (a)

45. A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not fall down. The time period of revolution will be

( a ) 4 sec

( b ) 10 sec

( c ) 8 sec

( d ) 1 sec

Ans:- (a)

46. Which is a constant for a freely falling object?

( a ) displacement

( b ) velocity

( c ) acceleration

( d ) speed

Ans:- (c)

47. Give an example of motion in two dimensions ———–

( a ) Motion along a straight line in any direction

( b ) Bird flying

( c ) A flying kite

( d ) Projectile motion

Ans:- (d)

48. Energy dissipated usually appears as

( a ) P.E.

( b ) Heat Energy

( c ) Chemical energy

( d ) Nuclear Energy

Ans:-(b)

49. The SI unit of work is

( a ) Newton

( b ) Joule

( c ) Mol

( d ) Calorie

Ans:-(b)

50. The value of solar constant.

( a ) 1.4 kW m-2

( b ) kW m-2

( c ) 1.6 kW m-2

( d ) 2 kw m-2

Ans:-(a)

51. The commercial unit of electric energy is

( a ) Kilo watt hour

( b ) watt

( c ) Watt hour

( d ) Kilo Watt

Ans:-(a)

52. The SI unit of power is

( a ) Joule

( b ) Newton

( c ) Watt

( d ) Kilowatt

Ans:-(c)