Question

1.Vectors can be added in
a) Triangle law b) Polygon law c) Square law d) both a and b
2.If two vectors are represented by the two sides of a triangle taken in order, then their resultant is the closing side of the triangle taken in
a) same order
b) reverse order c) random order d) all the above
3.More than two vectors are added according to
a) triangle law
b) polygon law c)parallelogram law d)square law
4.Two vectors ā and b lie in one plane and ċ lies in different plane (other than parallel plane).
Then
a) a+b+c≠0 b) a+7 can be zero c) b+c can't be zero d)all the above
5.If three vectors are represented as the three sides of a triangle taken in the same order, the
resultant is
a) 0
b) 1
c) infinite
d) depends on situation
6.A man walks 6 km due east and then walks 8 km due north and stops. The magnitude of displace-
ment in Km is
a) 6
b) 8
c) 10
d) 12
7.The displacement of a seconds hand of a clock of length 7 cm in 15 seconds is
a) 7 cm
b) 7√2 cm
c) 14 cm
d) 21 cm
8. The magnitude of the resultant of two equal vectors is equal to the magnitude of one of the
vectors if the angle between the two vectors is
b) ∅ = 30°
a) ∅ = 0°
c) ∅ = 60°
d)∅=120°
9.The magnitude of resultant of three unit vectors can't be
a) 0
b) 1
c)3
d) 4
10. Minimum number of unequal vectors required in a plane so that the resultant is zero is[
a) 2
b) 3
c) 4
d) 5​

Answer 1

Explanation:

.Vectors can be added in

a) Triangle law b) Polygon law c) Square law d) both a and b

2.If two vectors are represented by the two sides of a triangle taken in order, then their resultant is the closing side of the triangle taken in

a) same order

b) reverse order c) random order d) all the above

3.More than two vectors are added according to

a) triangle law

b) polygon law c)parallelogram law d)square law

4.Two vectors ā and b lie in one plane and ċ lies in different plane (other than parallel plane).

Then

a) a+b+c≠0 b) a+7 can be zero c) b+c can't be zero d)all the above

5.If three vectors are represented as the three sides of a triangle taken in the same order, the

resultant is

a) 0

b) 1

c) infinite

d) depends on situation

6.A man walks 6 km due east and then walks 8 km due north and stops. The magnitude of displace-

ment in Km is

a) 6

b) 8

c) 10

d) 12

7.The displacement of a seconds hand of a clock of length 7 cm in 15 seconds is

a) 7 cm

b) 7√2 cm

c) 14 cm

d) 21 cm

8. The magnitude of the resultant of two equal vectors is equal to the magnitude of one of the

vectors if the angle between the two vectors is

b) ∅ = 30°

a) ∅ = 0°

c) ∅ = 60°

d)∅=120°

9.The magnitude of resultant of three unit vectors can't be

a) 0

b) 1

c)3

d) 4

10. Minimum number of unequal vectors required in a plane so that the resultant is zero is[

a) 2

b) 3

c) 4

d) 5