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ECAT Pre General Science Mathematics Chapter 24 Vectors Online Test MCQs With Answers
Question # 1
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Question # 2
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 # 3
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parallel vectors
perpendicular vectors
concurrent vectors
collinear vectors
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Question # 4
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 # 5
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Free vector
Null vector
Unit vector
None of these
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Question # 6
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 # 7
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none of these
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Question # 8
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Question # 9
Which of the following represents a vector
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(x, y)
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Question # 10
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none of these
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Question # 11
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Question # 12
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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Question # 13
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Question # 14
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Question # 15
3j . k x i
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0
1
3
9
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Question # 16
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Question # 17
The area of the rhombus whose vertices are A(0,0),B(2,1),C(3,3),D(1,2) is
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36 square units
3 square units
6 square units
18 square units
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Question # 18
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l
2
+ m
2
+ n
2
= 0
l
2
- m
2
+ n
2
= 1
l
2
+ m
2
+ n
2
= 1
l
2
+ m
2
- n
2
= 0
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Question # 19
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direction ratios
direction cosines
direction angles
none of these
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Question # 20
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 # 21
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 # 22
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0
1
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Question # 23
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 # 24
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Question # 25
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a
1
+ a
2
a
2
1
+ a
2
2
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Question # 26
Which of the following is a vector
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length
momentum
volume
speed
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Question # 27
The angle between the vectors 3i + j - k and 2i - j + k is
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Question # 28
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none of these
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Question # 29
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Question # 30
The unit vector along z-axis is
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none of these
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Question # 31
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