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Mathematics ECAT Pre Engineering Chapter 24 Vectors Online Test MCQs With Answers
Question # 1
u,v,wand u x (v.w) are
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Equal
Parallel
Additive immense of each other
Meaningless
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Question # 2
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Question # 3
The unit vector along x-axis is
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none of these
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Question # 4
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 # 5
The unit vector along y-axis is
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none of these
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Question # 6
If a,b,c are three non-coplanar vector then [a +b,b +c,c +a] = _____
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[a.b.c]
2[a,b,c]
[abc]-2
2[abc]2
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Question # 7
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0
90°
180°
360°
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Question # 8
If the angle between two vectors with magnitude 2 and 15 is 30
°
then their scalar product is
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15
30
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Question # 9
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Question # 10
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none of these
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Question # 11
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Free vector
Null vector
Unit vector
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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A
0
Unit vector
None
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Question # 14
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Question # 15
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 # 16
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none of these
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Question # 17
Which of the following is a scalar
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weight
force
speed
momentum
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Question # 18
Which of the vectors have opposite direction?
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Question # 19
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none of these
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Question # 20
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none of these
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Question # 21
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Question # 22
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Question # 23
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Question # 24
For two vector a and b, a+b = _______
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a b
b+a
b-a
None
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Question # 25
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1
0
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Question # 26
The angle between the vectors 3i + j - k and 2i - j + k is
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Question # 27
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 # 28
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Question # 29
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none of these
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Question # 30
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Question # 31
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 # 32
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a
1
+ a
2
a
2
1
+ a
2
2
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