NCERT Solutions for class 12 Maths | Chapter 10 - Vector Algebra

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Questions
1 The points with position vectors (2. 6), (1, 2) and (a, 10) are collinear if the of a is
A -8
B 4
C 3
D 12

Answer:3
2 class 12 maths chapter 10 vector algebra
A 1
B √3
C 0
D None of these

Answer:√3
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3 class 12 maths chapter 10 vector algebra
A 0
B π/2
C π/4
D π

Answer:0
4 If be two unit vectors and 0 is the angle between them, then is equal to
A
B
C
D

Answer:
5 If ABCDEF is a regular hexagon then equals
A Zero
B
C
D

Answer:
6 The angle between the vector is
A π/2
B π/4
C π/3
D 0

Answer:π/2
7 class 12 maths chapter 10 vector algebra
A
B
C
D

Answer:
8 then the angle between
A π/2
B 0
C π/4
D π/6

Answer:π/2
9 According to the associative lass of addition of addition of sector

class 12 maths chapter 10 vector algebra

A
B
C
D

Answer:
10 If class 12 maths chapter 10 vector algebra be the position vector of the points A, B and C respectively, then
A The A, B and C are collinear
B A, B and C are not colinear
C
D None of these

Answer:The A, B and C are collinear
11 class 12 maths chapter 10 vector algebra
A π/6
B π/3
C π/2
D 5π/2

Answer:π/3
12 The projection of the vector class 12 maths chapter 10 vector algebra on the line joining the points (3, 4, 2) and (5, 6,3) is
A 2/3
B 4/3
C –4/3
D 5/3

Answer:4/3
13
A 8
B 7
C 4
D 2

Answer:7
14
A 0
B 1
C
D 2

Answer:
15 class 12 maths chapter 10 vector algebra
A 0
B 1
C
D

Answer:
16 Three points (2, -1, 3), (3, – 5, 1) and (-1, 11, 9) are
A Non-collinear
B Non-coplanar
C Collinear
D None of these

Answer:Collinear
17 The points with position vectors class 12 maths chapter 10 vector algebra are collinear if
A a = -40
B a = 40
C a = 20
D None of these

Answer:a = -40
18 If O is origin and C is the mid point of A (2, -1) and B (-4, 3) then the value of is
A
B
C
D

Answer:
19 If are three vectors such that and
A 0
B 1
C -19
D 20

Answer:-19
20 The value of λ for which the vectors are parallel is
A 2/3
B 3/2
C 5/2
D –2/5

Answer:2/3

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