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Online Tests

ECAT Pre General Science Mathematics Chapter 24 Vectors Online Test MCQs With Answers

Question # 1

The unit vector along z-axis is

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none of these

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Question # 2

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Question # 3

A vector with magnitude one is called

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constant vector

unit vector

zero vector

null vector

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Question # 4

Which of the following is not a unit vector

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[1, 1, 1]

[0, 1, 0]

[0, 0, 1]

[1, 0, 0]

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Question # 5

Which of the vectors have opposite direction?

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Question # 6

Which of the following is a vector.

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work

time

density

electric field

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Question # 7

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0

1

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Question # 8

Which of the following is a vector.

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distance

temperature

energy

acceleration

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Question # 9

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 # 10

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none of these

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Question # 11

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a₁+ a₂

a²₁+ a²₂

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Question # 12

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

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a b

b+a

b-a

None

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Question # 13

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A

0

Unit vector

None

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Question # 14

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Question # 15

The magnitude of a vector can never be

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Zero

Negative

Positive

None of these

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Question # 16

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Question # 17

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 # 18

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none of these

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Question # 19

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Question # 20

Three points whose position vector a,b,c are collinear

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axb +b x c+ c x a = 0

a,b +b,c +c,a =0

a,|a xc| =0

a+b+c =0

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Question # 21

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

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none of these

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Question # 22

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 # 23

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none of these

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Question # 24

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A,. B, C are coincident

A, B, C are collinear

Both A and B

None of these

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Question # 25

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0

1

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Question # 26

3j . k x i

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0

1

3

9

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Question # 27

The physical quantity which can be specified by a number alongwith unit is called a

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scalar

vector

constant

none of these

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Question # 28

Unit vector in the positive direction of x-axis is

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Question # 29

The direction cosines of y-axis are

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1, 0, 0

0, 1, 0

0, 0, 1

1, 1, 1

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Question # 30

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l²+ m²+ n²= 0

l²- m²+ n²= 1

l²+ m²+ n²= 1

l²+ m²- n²= 0

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