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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

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Question # 3

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Question # 4

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0

1

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Question # 5

If |αi + (α+1)j +2k| =3 then value of α is

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1,2

-1,-2

1,-2

-1,2

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Question # 6

The unit vector along z-axis is

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none of these

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Question # 7

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1

0

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Question # 8

For two vector a and b, a+b = _______

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a b

b+a

b-a

None

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Question # 9

If θ be angle between u,v and u,v determine the sides of a triangle then the third side opposite to angle θ has length

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|u+v|

|u|+|v|

|u-v|

|u|-|v|

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Question # 10

A vector of magnitude zero is called

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Position vector

Null vector

Free vector

None of these

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Question # 11

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perpendicular vectors

concurrent vectors

parallel vectors

none of these

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

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Question # 14

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Question # 15

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a₁+ a₂

a²₁+ a²₂

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Question # 16

If Projvu = Projuv, then

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Uand vare parallel

|u|=|v|

Uandvre perpendicular

One ofuorv

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Question # 17

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Question # 18

If a,b c are sides of a triangle taken in order then a x b =

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b x c

b x a

cxa

Both a & b

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Question # 19

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0

1

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Question # 20

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direction ratios

direction cosines

direction angles

none of these

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Question # 21

Which of the following is a vector.

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distance

temperature

energy

acceleration

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Question # 22

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[0, 0, 0]

[1, 0, 0]

[0, 1, 0]

[0, 0, 1]

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Question # 23

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none of these

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Question # 24

The number z so that the triangle with vertices A(1,-1,0),B(-2,2,1)and C(0,2,z) is a right triangle with right angle at vertex C

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1,2

-1,-2

2,-1

-2,1

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Question # 25

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direction ratios

direction cosines

direction angles

none of these

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Question # 26

Which of the following is a scalar.

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force

frequency

weight

acceleration

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Question # 27

The unit vector along x-axis is

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none of these

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Question # 28

If a2 = b2 then

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a = b

a+b= 1

|a+b| =0

None

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Question # 29

[i,j,k]

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0

2

1

-2

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Question # 30

Which of the following is a scalar.

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electric field

magnetic field

weight

mass

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Question # 31

The unit vector along y-axis is

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none of these

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Question # 32

If the vector 2i + 4j - 7k and 2i + 6j + xk are perpendicular then x = ?

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0

2

4

7

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