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Math 12 Chapter 7
Vectors
Test - 5
1.
Area of the parallelogram having diagonals A = 3i + j - 2k and B = i - 3j + k is:
a) 1
b) 90
c) 3
d) 5
Ö
3
2.
(i + 2j) x k = ?
a) 2 + 2k
b) 2i - j
c) None of the above
d) 5
Ö
3
3.
The area of the triangle with vertices A (1,1,1) B (1,1,0) C (1,0,0) is:
a) None of the above
b) -2
c) 1
d) 2i - j
4.
If F = 3i - j + k, d = 2i + j + 4k then work done =?
a) 9
b) -9
c) 1
d) None of the above
5.
If A = 6i + 7j, B = -7/2i + 3j then A & B are:
a) None of the above
b) -9
c) Neither
d) Perpendicular
6.
a . b
a) ab Cosec
q
b) ab Sec
q
c) ab Cos
q
d) ab Sin
q
7.
a x b
a) ab Sin
q
b) ab Tan
q
c) ab Cosec
q
d) ab Cos
q
8.
��3i - 4j��
a) 3
b) 5
c) 4
d) 6
9.
Cos
q
a) a . b / ab
b) ab Sec
q
c) ab / a . b
d) ab Cos
q
10.
Sin
q
a) ��a x b�� / ab
b) ab
q
c) ab / ��a x b��
d) a
q
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