Physics I X Chapter Vectors

1. Time, volume, speed and mass are scalar quantities. a) False b) True

2. Vectors are those quantities which can be described completely by a number and a unit. a) False b) True

3. In books, vectors are usually written in small letters. a) False b) True

4. In the same question, the same scale is taken for similar quantities to be represented. a) False b) True

5. With the help of frame of reference, the representative line of the vector is drawn in its particular direction a) False b) True

6. If two vectors are subtracted vector B from the vector A we can write it as A-B = A+(-B) a) True b) False

7. If a vector A is multiplied by 2, then the new vector will have same magnitude as that of A. a) False b) True

8. If a vector of 2cm and it is multiplied by 2 then the magnitude of the resultant will be 4 cm a) False b) True

9. Base / hypotenuse = sine a) False b) True

10. The numerical values of 32; trigonometrical ratios depends upon the magnitudes of the angles. a) False b) True

11. Sine 60° = 0.866 a) True b) False

12. A vector is represented by a straight line of a specific length having an arrow head. a) True b) False

13. If two rectangular components are given then we can find the direction of the resultant vector by tanq = Fx / Fy a) False b) True

14. The momentum is a scalar quantity. a) True b) False

15. The vectors may be added or subtracted by using the head to tail rule. a) True b) False

16. The decomposition of a vector into its components is called resolution of a vector. a) False b) True

17. Sin 45° = Cos 45° a) False b) True

18. Rectangular components are perpendicular to each other. a) False b) True

19. The head of the line with arrow representing the vector quantity is called tail. a) False b) True

20. The value of Cos 32; 0° is: a) 0 b) 1 c) 0.5 d) 0.866

21. All Physical quantities may be classified into a) Scalar and vectors b) All the above c) Scalars d) Vectors

22. A physical quantity which is specified by magnitude and direction is called as: a) Volume b) Density c) Vector quantity d) Speed

23. The value of sin 90° a) 0.5 b) 0.866 c) 0.707 d) 1.0

24. The rectangular components are at: a) 90° to each other b) Parallel to X-axis c) Parallel to Y-axis d) None of these

25. Fy is equal to a) F tanq b) F Sinq c) F Cosq d) F Cotq

26. A vector quantity is denoted by: a) Straight and parallel line b) An arrow c) Straight line d) Parallel line

27. Two or more vectors are added graphically by: a) Left hand rule b) Left and hand rule c) Right hand rule d) Head to tail rule

28. Which of the following is a vector quantity a) Length b) Speed c) Time d) Displacement

29. The negative vector is a vector whose magnitude is equal to another vector but: a) Half of its magnitude b) Opposite in direction c) Same direction d) Perpendicular to another vector

30. The ratio between ; perpendicular and base is called a) Tanq b) Cotq c) Sinq d) Cosq

31. Which of the following is a scalar ; quantity a) Weight b) Velocity c) Mass d) Displacement

32. When rocket takes of the motion of the rocket and the burning gases are in the a) East direction b) Opposite direction c) Perpendicular d) West direction

33. A man walks 4m from point A towards east and then 3m towards north what is his displacement from the point A: a) 6m b) 7m c) 5m d) 10m

34. If a vector A is multiplied by 3, then the resultant vector will have magnitude a) None of the above b) Thrice of its magnitude c) Four times of its value d) Twice of its value

35. To represent a vector a straight line is drawn: a) False b) True

36. A vector which has zero magnitude with no direction is called as: a) Negative vector b) Null vector c) Zero vector d) All of these

37. When two equal and opposite vectors are added and their resultant vector has zero magnitude then the vectors are called: a) Opposite vectors b) Negative vectors of each other c) Action and reaction vectors d) Null vectors

38. If the tail of the first vector joins with the head of the other vector, this rule of addition of vectors is called as: a) Last vector b) Tail & head vector rule c) Head & tail rule d) None of these

39. If a vector is multiplied by a positive number then: a) Direction will change b) Magnitude will change but direction will remains the same c) Both magnitude and direction will change d) None of these

40. If the vector is multiplied by a negative number then: a) Only magnitude will change b) Only direction will change c) Both magnitude and direction will change d) None of these

41. Trigonometric calculations are applicable in: a) Triangular vector b) Linear vectors c) Mixed vectors d) All of these

42. A 15N force is acting on a body along X axis its vertical component will be: a) 15 N b) 7.5 N c) Zero d) 30 N

43. Tan 32; 45° = a) 1.5 b) 1.0 c) 2.9 d) 0.866

44. A vector can be divided into: a) Two parts only b) Many parts c) Only one part d) None of these

45. The components of vector, which are perpendicular to each other, are called : a) Parallel components b) Linear components c) Equal components d) Rectangular components

46. Weight is a : a) Scalar quantity b) Vector quantity c) Normal quantity d) All are not applicable

47. Fy represents as: a) Y-component of force b) X - component of force c) Both X & Y components d) None of these

48. The decomposition of a vector into its components is called: a) Resolution of vector b) Addition of vector c) Negative vector d) Null vector

49. Pressure is: a) Momentum b) Force per unit area c) Force per unit volume d) Restoring force

50. The value of the angle can be determined by using the trigonometric table or: a) Scientific calculator b) Normal calculator c) By using compass needle d) None of these

51. Energy is a: a) Vector quantity b) Scalar quantity c) Having direction but no units d) All are applicable

52. The addition of two or more vectors can be represented by a: a) Single Vector b) Scalar quantity c) Line d) Circle

53. According to the Pythagoras theorem F2 = Fx2 + a) Fy2 b) Fx + Fy c) Fx - Fy d) None of these

54. In a plane the direction of a vector is represented with help of two mutually a) Perpendicular lines b) Parallel lines c) By a single arrow d) None of these

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