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Mathematics ECAT Pre Engineering Chapter 24 Vectors Online Test MCQs With Answers
Question # 1
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 # 2
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Question # 3
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[0, 0, 0]
[1, 0, 0]
[0, 1, 0]
[0, 0, 1]
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Question # 4
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direction ratios
direction cosines
direction angles
none of these
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Question # 5
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 # 6
Which of the following is a scalar.
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force
frequency
weight
acceleration
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Question # 7
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 # 8
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1
0
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Question # 9
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 # 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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Question # 14
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 # 15
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Question # 16
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 # 17
If θ be angle between u,v and u,v determine the sides of a triangle then the third side opposite to angle θ has length
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|u+v|
|u|+|v|
|u-v|
|u|-|v|
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Question # 18
If a +b +c =0 then which of the following is true
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a =b =c =0
a,b =b,c =c,a
a xb=b xc =c xa
None
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Question # 19
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 # 20
The position vector of the point P(a, b, c) is
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Question # 21
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none of these
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Question # 22
Which of the following represents a vector
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(x, y)
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Question # 23
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none of these
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Question # 24
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0
1
-1
None
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Question # 25
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none of these
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Question # 26
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Question # 27
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Question # 28
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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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