Physics Vectors and Scalars Online Mcqs Test

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Question 1

1. Rectangular coordinate system is also called

Answer

Polar coordinate system

Answer

Cartesian coordinate system

Answer

Cylindrical coordinate system

Answer

Spherical coordinate system

Question 2

2. Addition of vector obeys

Answer

Commutative law

Answer

Distributive law

Answer

Associative law

Answer

All given laws in a, b and c

Question 3

3. A vector can be multiplied by a number. The number may be

Answer

Dimensionless

Answer

Dimensional scalar

Answer

All of these

Question 4

4. Null vector is a vector which has

Answer

Zero magnitude

Answer

No specified direction

Answer

Both a and b are correct

Answer

Both a and b are not correct

Question 5

5. Which of the following is a Vector?

Question 6

6. Which of the following is a vector?

Question 7

7. Which of the following is a scalar?

Answer

Elementary area

Answer

Kinetic energy

Answer

Weight of a body

Answer

Wind velocity

Question 8

8. Which of the following is a scalar?

Answer

Electric field

Answer

Magnetic moment

Answer

Acceleration

Answer

Electrostatic Potential

Question 9

9. Pressure is a:

Answer

Axial vector

Answer

Polar vector

Answer

Neither scalar nor vector

Question 10

10. For the resultant of two vectors to be maximum the angle between them should be:

Answer

Zero degree

Answer

60 degrees

Answer

90 degrees

Answer

180 degrees

Question 11

11. The magnitudes of sets of three vectors of same type are given below. The resultant of which set cannot be zero?

Answer

10, 10, 10

Answer

10, 10, 20

Answer

10, 20, 10

Answer

10, 20, 40

Question 12

12. Two forces of 6N and 8N can be applied to produce an effect of a single force of:

Question 13

13. A force has magnitude 20N. Its one rectangular component is 12N, the other rectangular component must be:

Question 14

14. The dimension of torque is

Answer

[ML²T¯²]

Answer

[ML¯²T¯²]

Question 15

15. Torque acting on a body determines

Answer

Acceleration

Answer

Linear acceleration

Answer

Angular acceleration

Answer

Direction of motion of the body

Question 16

16. A body is equilibrium

Answer

Always at rest

Answer

Always is uniform motion

Answer

May be at rest or in uniform motion

Answer

May be at rest or in motion

Question 17

17. A body will be in complete equilibrium when it is satisfying:

Answer

1st condition of equilibrium

Answer

2nd condition of equilibrium

Answer

Both 1st and 2nd condition of equilibrium

Answer

Impossible

Question 18

18. Which one is not a type of dynamic equilibrium?

Answer

Rotational equilibrium

Answer

Translational equilibrium

Answer

Static equilibrium

Answer

Both a and c are correct answer

Question 19

19. Which of the following pairs does not have identical dimensions?

Answer

Torque and energy

Answer

Momentum and impulse

Answer

Energy and work

Answer

Mass and moment of inertia

Question 20

20. A central force is that which

Answer

Can produce torque

Answer

Cannot produce torque

Answer

Sometime can produce torque some time cannot

Answer

Has no relation with torque

Question 21

21. It is easier to turn of steering wheel with both hands than with a single hand because

Answer

Accelerating force increases on the wheel

Answer

Two forces act on the wheel

Answer

Two hands provide firm grip

Answer

Couple acts on the wheel

Question 22

22. A scalar is a physical quantity which is completely specified by

Answer

Direction only

Answer

Magnitude only

Answer

Both magnitude and direction

Answer

None of these

Question 23

23. Vectors are those physical quantities which requires

Answer

Magnitude and directions

Answer

None of these

Question 24

24. Which of the following is a scalar quantity?

Answer

Displacement

Question 25

25. In accordance axes system, x and y axes are drawn by two lines that are

Answer

Parallel to each other

Answer

Perpendicular to each other

Answer

At 45 degree with each other

Answer

At 0 degree with each other

Question 26

26. An axis which is at right angle to both X and Y axes and points in space is called

Answer

Unit vector axis

Answer

Zero vector axis

Answer

None of these

Question 27

27. Two forces of 10N and 15N are acting simultaneously on an object in the same direction. Their resultant is

Question 28

28. Negative of vector can be made when

Answer

Magnitude is zero

Answer

Directions is reserves with negative magnitude

Answer

Only direction is changed to right angle

Answer

None of these

Question 29

29. If two non-zero vector A and B are parallel to each other, then A . B is equal to

Question 30

30. When a vector is multiplied by a scalar, the product of the quantity will be

Answer

A new vector quantity

Answer

New direction

Answer

Same direction

Question 31

31. The vector product of two vectors is zero, when

Answer

They are parallel to each other

Answer

They are equal vectors

Answer

They are perpendicular to each other

Answer

They are inclined at angle of 60°

Question 32

32. If A. B = 0 and also A x B = 0 , then

Answer

A and B are perpendicular to each other

Answer

A and B are anti-parallel to each other

Answer

A and B are parallel to each other

Answer

Either A or B is a null vector

Question 33

33. Position vector is a vector, which describes the

Answer

Location of a point with respect to origin

Answer

Location of a point with respect to any point

Answer

Location of a point with respect to some related point

Answer

None of these

Question 34

34. Two vectors AB and BC act on point B at right angle to each other. The magnitude of their resultant is 13 and the magnitude of BC is 12, then the magnitude of AB is

Question 35

35. The position vector in two dimensions is represented as

Answer

r = a i + b j

Answer

r = a j + b i

Answer

r = √a² + b²

Question 36

36. The magnitude of the scalar product is

Answer

None of these

Question 37

37. Which of the following may be the rectangular components of force 10 Newton’s?

Answer

6 and 8 New tons

Answer

2.5 and 25 New tons

Answer

2 and 5 New tons

Answer

3 and 5 New tons

Question 38

38. When the scalar product of two vectors are parallel to each other than A.B is of

Answer

Maximum value

Answer

Minimum value

Answer

None of these

Question 39

39. The position vector of a point in xz-plane is given by

Answer

r = x i + y j

Answer

r = y i + z k

Answer

r = x i + y j + zk

Answer

r = x i + zk

Question 40

40. In right hand rule, the direction of the product vector will be

Answer

Along the thumb erect

Answer

Perpendicular to the erect thumb

Answer

Along the rotation of fingers

Answer

None of these

Question 41

41. The rectangular components of a vector have angle between them

Question 42

42. The cross product of j x k given by

Question 43

43. The dot product of two vectors is negative when

Answer

They are parallel vectors

Answer

They are perpendicular vectors

Answer

They are anti-parallel vectors

Answer

None of these

Question 44

44. The self-product of two vectors in cross product is

Answer

Square of vector

Answer

Only same vector

Answer

None of these

Question 45

45. Can the magnitude of a vector have a negative value

Answer

Yes in some cases

Answer

None of these

Question 46

46. Two forces are acting together on an object. The magnitude of their resultant is of minimum value when the angle between the force is

Question 47

47. Negative of vector can be made by

Answer

Taking absolute value

Answer

Making the direction reserves of axis

Answer

Reserving the direction

Answer

None of these

Question 48

48. When a vector is multiplied by a scalar of positive value, the product of the quantity will be

Answer

Multiple of the vector quantity in the same direction

Answer

Multiple of the vector quantity in the opposite direction

Answer

Multiple of the vector quantity perpendicular to the original vector

Answer

None of these

Question 49

49. Null vector may have

Answer

Specific direction

Answer

Any direction

Answer

Not A and B

Answer

None of these

Question 50

50. Which of the following is the only vector quantity?

Answer

Temperature

Question 51

51. Which of the following lists of physical quantities consists only of vectors?

Answer

Time, temperature, velocity

Answer

Force, volume, momentum

Answer

Velocity, acceleration, mass

Answer

Force, acceleration, velocity

Question 52

52. The angle between rectangular components of a vector is

Question 53

53. A force of 10N is acting along y-axis. Its component along x-axis is

Question 54

54. Two forces of 10N and 15N are acting simultaneously on an object in the same direction. Their resultant is

Question 55

55. If the dot product of two non-zero vectors vanishes, the vectors will be

Answer

In the same direction

Answer

Opposite to each other

Answer

Perpendicular to each other

Question 56

56. It two non-zero vector A and B are parallel to each other, then A, B is equal to

Question 57

57. The dot product of two vectors is negative when

Answer

They are parallel vectors

Answer

They are anti-parallel vectors

Answer

They are perpendicular vectors

Answer

None of these

Question 58

58. The vector product of two non-zero vectors is zero, when

Answer

They are parallel to each other

Answer

They are perpendicular to each other

Answer

They are equal vectors

Answer

They are inclined at angle of 60°

Question 59

59. If (a x b) points along positive z-axis, then the vectors a and b must lie in

Answer

None of these

Question 60

60. Identify the vector quantity

Answer

Angular momentum

Question 61

61. Which of the following quantities is a scalar?

Answer

Magnetic moment

Answer

Acceleration due to gravity

Answer

Electric field

Answer

Electrostatic potential

Question 62

62. A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shortest path in 15 minutes. The velocity of the river in km/s is:

Question 63

63. The magnitudes of vectors A, B and C are 3, 4 and 5 units respectively. If A + B = C, the angle between A and B is:

Answer

cos¯¹ 0.6

Answer

tan¯¹ 7/5

Question 64

64. The angle between two vectors -2i + 3j + k and I + 2j – 4k is:

Answer

None of these

Answer 163

A²B sin θ

Answer 164

A²B Cos θ

Answer 165

Its velocity

Answer 166

Its acceleration

Answer 167

Its position vector

Answer 168

Its momentum

Answer 169

Speed changes

Answer 170

Acceleration changes

Answer 171

Direction of motion changes

Answer 172

Displacement from origin changes

Answer 173

Temperature

Answer 174

ML¯²T¯²

Answer 175

Force, displacement

Answer 176

Force, velocity

Answer 177

Force, acceleration

Answer 178

Force, momentum

Answer 179

Chance of collision

Answer 180

Force acting

Answer 181

1st law of motion

Answer 182

2nd law of motion

Answer 183

Law of conservation of momentum

Answer 184

Law of conservation of energy

Answer 185

Not constant

Answer 186

Constant if the rate of ejected gases is constant

Answer 187

Constant for short range rocket

Answer 188

Second law of motion

Answer 189

Third law of motion

Answer 190

First law of motion

Answer 191

Law of gravitation

Answer 192

Both A and C

Answer 193

A gas filled balloon

Answer 194

Bullet fired from gun

Answer 195

A football kicked

Answer 196

A baseball shot

Answer 197

Straight line

Answer 198

Equal to 45°

Answer 199

Equal to 90°

Answer 200

Equal to each other

Answer 201

None of these

Total Questions:	82
Time Allowed:	60 Minutes
Total Marks:	82
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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