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ECAT Pre General Science Mathematics Chapter 24 Vectors Online Test MCQs With Answers
Question # 1
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none of these
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Question # 2
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Question # 3
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 # 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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12
6
8
none of these
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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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25
16
5
0
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Question # 8
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Question # 9
The ortho center of triangle whose vertices are (0,0)(3,0)(0,4) is
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(0,0)
(1,1)
(2,2)
(3,3)
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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
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Question # 13
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0
1
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Question # 14
If a2 = b2 then
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a = b
a+b= 1
|a+b| =0
None
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Question # 15
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none of these
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Question # 16
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 # 17
Which of the vectors have opposite direction?
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Question # 18
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Question # 19
The unit vector along x-axis is
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none of these
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Question # 20
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[0, 0, 0]
[1, 0, 0]
[0, 1, 0]
[0, 0, 1]
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Question # 21
Which of the following is a scalar.
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force
frequency
weight
acceleration
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Question # 22
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none of these
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Question # 23
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Question # 24
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Question # 25
[i,j,k]
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0
2
1
-2
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Question # 26
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1
0
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Question # 27
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 # 28
If C is the mid point of AB and P is any point outside AB, then
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Question # 29
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 # 30
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A
0
Unit vector
None
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Question # 31
The position vector of any point in space is
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