1st Year Mathematics Chapter 14 TestUNIT 14: Vectors in space

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Angle in semi circle is:

   1. 30^o

   2. 45^o

   3. 90^o

   4. 60^o

2. A vector with magnitude 1 is called:

   1. Null vector

   2. Unit vector

   3. Zero vector

   4. Constant vector

3. The angle between the vectors  is:

   1. 30^o

   2. 40^o

   3. 60^o

   4. 90^o

4. Moment of force F about a point with position vector r will be eqal to:

   1. F x r

   2. r x F

   3. d x F

   4. F x d

5. Vector product of two vector is a ......:

   1. Scalar quantity

   2. Unit vector

   3. Vector quantity

   4. Null vector

6. The dot product of vectors u and v is ......:

   1. Cos  sin 

   2. IuIIvI=cos

   3. uv cos 

   4. None

7. The magnitude of the vector v=ai+b + ck is:

   1. a²+b²+c²

   2. a+b+c

   3. a³+b³+c³

   4. 

8. Which of the following is a vector?

   1. Time

   2. Work

   3. Density

   4. Electric field

9. Projection of a vector v along u is:

   1. 

   2. 

   3. 

   4. 

10. The magnitude of dot an cross products of two vectors are 6 and  respectively then angle between vectors is ......:

    1. 90^o

    2. 60^o

    3. 30^o

    4. 45^o