Mathematics MCQS for class 12 with Answers
A physical quantity that posses both magnitude and direction is called:
Variable
Vector
Scalar
Constant
Ifa,b & c are three vectors then vector triple product of these vectors is:
a
axbxc
Both (a)&(b)
a.bxc
If the vector 2i + 4j – yk and 2i + 6j + xk are perpendicular then x =
1
8
2
4
For a unit vector j , j.j=
0
2
1
1
A scalar quanity, is one that possesses only
None of these
Magnitude
Direction
Both a and b
The dot product of unit vector i with unit vector i is
1
3
2
0
The dot product of unit vector k with unit vector j is
1
0
3
2
The vector k = [0, 0, 1] is called unit vector along
x-axis
y-axis
None of these
z-axis
Two zero vectors isregarded to the perpendicular to:
Every vector
In some cases
Both (a)&(b)
None of these
The unit vector along y-axis is denoted by:
k?
None of these
î
None of these
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