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Online Tests

Mathematics ECAT Pre Engineering Chapter 24 Vectors Online Test MCQs With Answers

Question # 1

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Question # 2

If 2 and 2 are x and y components of vector then its angle with x-axis is

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30°

45°

60°

90°

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Question # 3

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none of these

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Question # 4

If |a x b|2 + (a,b)2 = _____

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|a|2 + |b|2

|a|2- |b|2

|a|2|b|2

None

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Question # 5

Which of the following does not represent absolute value of a vector

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magnitude

length

norm

number

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Question # 6

The unit vector along x-axis is

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none of these

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Question # 7

Which of the following us a scalar

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displacement

velocity

acceleration

density

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Question # 8

The angle between the vectors 3i + j - k and 2i - j + k is

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Question # 9

The magnitude of a vector can never be

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Zero

Negative

Positive

None of these

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Question # 10

Projection of vector u along v is

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|v| cosθ

|u| cosθ

|v| sinθ

|u| sinθ

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Question # 11

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Question # 12

The zero vector is regarded to be parallel to

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Every vector

Is some cases

Both a,b

None

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Question # 13

The position vector of a point (x, y) in xy plane is

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none of these

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Question # 14

3j . k x i

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0

1

3

9

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Question # 15

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A

0

Unit vector

None

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Question # 16

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a₁+ a₂

a²₁+ a²₂

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Question # 17

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0

1

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Question # 18

If a +b +c =0 then which of the following is true

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a =b =c =0

a,b =b,c =c,a

a xb=b xc =c xa

None

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Question # 19

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0

1

-1

None

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Question # 20

u,v,wand u x (v.w) are

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Equal

Parallel

Additive immense of each other

Meaningless

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Question # 21

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Question # 22

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Question # 23

If a force F = 2i + j +3k acts at point (1,-2,2) of a body then the moment of F about a pint lying on the line of action of the force is

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5

Equal to the moment of the force about origin

0

Cannot be found

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Question # 24

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[0, 0, 0]

[1, 0, 0]

[0, 1, 0]

[0, 0, 1]

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Question # 25

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Question # 26

If the angle between two vectors with magnitude 6 and 2 is 60° when their scalar product is

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12

6

3

0

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Question # 27

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0

1

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Question # 28

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Question # 29

A vector with magnitude one is called

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constant vector

unit vector

zero vector

null vector

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Question # 30

Which of the following is a vector.

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energy

force

work

power

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Question # 31

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[0, 0, 0]

[1, 0, 0]

[0, 1, 0]

[0, 0, 1]

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