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ECAT Pre General Science Mathematics Chapter 24 Vectors Online Test MCQs With Answers
Question # 1
The angle between the vectors 3i + j - k and 2i - j + k is
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Question # 2
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none of these
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Question # 3
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 # 4
Projection of vector u along v is
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|v| cosθ
|u| cosθ
|v| sinθ
|u| sinθ
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Question # 5
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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 # 6
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 # 7
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none of these
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Question # 8
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Question # 9
The unit vector along z-axis is
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none of these
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Question # 10
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Question # 11
The physical quantity which possesses both magnitude and direction is called a
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scalar
vector
constant
none of these
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Question # 12
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 # 13
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Question # 14
The null vector is regarded to be perpendicular to
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Every vector
In some cases
Both a b
None
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Question # 15
Which of the vectors have opposite direction?
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Question # 16
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none of these
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Question # 17
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Question # 18
The position vector of a point (x, y) in xy plane is
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none of these
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Question # 19
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[0, 0, 0]
[1, 0, 0]
[0, 1, 0]
[0, 0, 1]
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Question # 20
Which of the following represents a vector
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(x, y)
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Question # 21
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Question # 22
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none of these
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Question # 23
Which of the following us a scalar
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displacement
velocity
acceleration
density
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Question # 24
3j . k x i
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0
1
3
9
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Question # 25
The position vector of any point in space is
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Question # 26
Which of the following is a vector.
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work
time
density
electric field
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Question # 27
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none of these
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Question # 28
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none of these
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Question # 29
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0
90°
180°
360°
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Question # 30
If a,b,c are unit vectors then |a + b|2 +|a - b|2
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4
8ab
9cos
4(a,b)
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Question # 31
If C is the mid point of AB and P is any point outside AB, then
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Question # 32
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Free vector
Null vector
Unit vector
None of these
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