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ECAT Pre General Science Mathematics Chapter 24 Vectors Online Test MCQs With Answers
Question # 1
The unit vector along z-axis is
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none of these
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Question # 2
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Question # 3
A vector with magnitude one is called
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constant vector
unit vector
zero vector
null vector
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Question # 4
Which of the following is not a unit vector
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[1, 1, 1]
[0, 1, 0]
[0, 0, 1]
[1, 0, 0]
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Question # 5
Which of the vectors have opposite direction?
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Question # 6
Which of the following is a vector.
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work
time
density
electric field
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Question # 7
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0
1
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Question # 8
Which of the following is a vector.
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distance
temperature
energy
acceleration
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Question # 9
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 # 10
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none of these
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Question # 11
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a
1
+ a
2
a
2
1
+ a
2
2
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Question # 12
For two vector a and b, a+b = _______
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a b
b+a
b-a
None
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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
The magnitude of a vector can never be
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Zero
Negative
Positive
None of these
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Question # 16
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Question # 17
Which of the following does not represent absolute value of a vector
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magnitude
length
norm
number
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Question # 18
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none of these
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Question # 19
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Question # 20
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 # 21
The position vector of a point (x, y) in xy plane is
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none of these
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Question # 22
The number z so that the triangle with vertices A(1,-1,0),B(-2,2,1)and C(0,2,z) is a right triangle with right angle at vertex C
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1,2
-1,-2
2,-1
-2,1
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Question # 23
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none of these
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Question # 24
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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 # 25
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0
1
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Question # 26
3j . k x i
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0
1
3
9
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Question # 27
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 # 28
Unit vector in the positive direction of x-axis is
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Question # 29
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 # 30
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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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