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Math 12 Chapter 7
Vectors
Test - 14
1.
If p(x,y) cuts the line joining A(3,4) B(7,8) in the ratio 3 : 4 then BP = 3/7 BA
a) False
b) True
2.
If p(x,y) cuts line joining the pts A(1,2), B(3,4) in the ratio 3:4 then AP = 3/7 AB
a) False
b) True
3.
If r = xi + yj then ��
®
r �� =
Ö
(x
2
- y
2
).
a) True
b) False
4.
The distance between two points in any direction is a vector quantity.
a) True
b) False
5.
If r = xi - yj then �� r �� =
Ö
(x
2
- +y
2
).
a) True
b) False
6.
If r = 3i + 4j then �� r �� =
Ö
29
a) True
b) False
7.
The scalar quantity is a vector quantity.
a) False
b) True
8.
The vector quantity is a scalar quantity.
a) False
b) True
9.
If 0 is origin and p(x,y,z) is any point in the space then op = xi + yj - zk.
a) True
b) False
10.
If
®
r = 4i + 2j then �� r �� =
Ö
21
a) False
b) True
11.
If r = 1/2i +
Ö
3/2 j then �� r �� = 2.
a) True
b) False
12.
If 0 is the origin and p(x,y,z) is any point then op = xi + yj.
a) True
b) False
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