ECAT Pre General Science Physics Chapter 2 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 2 Vectors and Equilibrium

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ECAT Pre General Science Physics Chapter 2 Vectors and Equilibrium

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Question # 1

The direction of a vector in space requires:

Question # 2

Two forces each of 10 N act on a body, if the force are inclined at 30° and 60° respectively with x-axis, then x-component of their resultant is:

Question # 3

A vector which has magnitude 'one' is called:

Question # 4

All trigonometric functions (sine, cosine, tangent etc) are positive in:

Question # 5

When the magnitude of two component vectors are equal to that of their resultant, then the angle between the components is:

Question # 6

The change of order of vectors in a dot product of two vectors:

Question # 7

Two forces of 10 N and 8 N are applied simultaneously to a body. the maximum value of their resultant is:

Question # 8

The resultant of two velocities 3 m/sec and 400 cm/sec making an angle 90° with each other is:

Question # 9

When a vector is multiplied by a negative number, its direction:

Question # 10

For measuring the angle between two vectors graphically, we join:

Question # 11

All trigonometric functions (since, cosine tangent etc. ) are positive in:

Question # 12

If a vector lies in second quadrant, than Bxand Byare:

Question # 13

Tick the correct answer:

Question # 14

The vector in space has:

Question # 15

Torque is also called:

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Sr. # Question Answer
1 When the magnitude of two component vectors are equal to that of their resultant, then the angle between the components is:

A. 60°

B. 90°

C.120°

D. 150°

2 Two vectors having different magnitudes:

A. Have their directions opposite

B. May have their resultant zero

C.Cannot have their resultant zero

D. None of these

3 All trigonometric functions (sine, cosine, tangent etc) are positive in:

A. 1st quadrant

B. 2nd quadrant

C.3rd quadrant

D. 4th quadrant

4 For measuring the angle between two vectors graphically, we join:

A. Tails of both the vectors

B. Tail of one vector with the head of other

C.Heads of both the vectors

D. None of these

5 If two forces of magnitudes 3.5 and 2.5 N act on a body such that the angle between the forces is zero, then magnitude of the resultant will be:

A. 1.0 N

B. 6 N

C.3.5 N

D. 12 N

6 Two forces of 10N and 8N are applied simultaneously to a body. The maximum value of their resultant is:

A. 20 N

B. -2 N

C.18 N

D. 36 N

7 All trigonometric functions (since, cosine tangent etc. ) are positive in:

A. 1st Quadrant

B. 2nd Quadrant

C.3rd Quadrant

D. 4th Quadrant

8 Tick the correct answer:

A. Torque is a vector quantity

B. Torque is the turning effect of a force

C.Torque is called moment of a force

D. All of above

9 The perpendicular distance from the axis of rotation to the line of action of force is called:

A. Moment arm

B. Moment of a force

C.Torque

D. Non of these

10 If x-component of a vector is -3 N and y-component is 3 N, then angle of resultant vector will x-axis is:

A. 45°

B. 315°

C.135°

D. 225°

11 Two vectors to be combined have magnitudes of 60 N and 35 N. Pick the possible answer:

A. 100 N

B. 70 N

C.20 N

D. Zero

12 Two forces each of 10 N act on a body, if the force are inclined at 30° and 60° respectively with x-axis, then x-component of their resultant is:

A. 20 N

B. 13.66 N

C.10 N

D. 8.66 N

13 A force of 5 n is acting Y-axis. Its component along X-axis is:

A. 7 N

B. 5 N

C.Zero

D. 10 N

14 The change of order of vectors in a dot product of two vectors:

A. Changes its value

B. Doesn't change it's value

C.Changes the direction product quantity

D. None of these

15 Two forces each of the magnitude F act perpendicular to each other. The angle made by the resultant force with the horizontal will be:

A. 30°

B. 45°

C.60°

D. 90°

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