# Vector Algebra – Exercise – 1

Exercise – 1

1. If , then equals : (a) 0 (b) 1 (c) 2a.b (d) none of these

Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss

2. Let and be two unit vectors such that + is also a unit vector. Then the angle between and is : (a) 300 (b) 600 (c) 900 (d) 1200

Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss

3. If are non-coplanar vectors then is equal to : (a) 0 (b) 1 (c) 3 (d) None of there

Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss

4. The points with position vector 60i + 3j, 40i – 8j and ai –52j are collinear if : (a) a = -40 (b) a = 40 (c) a = 20 (d) none of these

Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss

5. The value of k for which the points A(1, 0, 3) , B(-1, 3,4) ,C(1, 2, 1) and D(k, 2, 5) are coplanar is : (a) 1 (b) 2 (c) 0 (d) -1