Multiple Choice Questions
1. Work is
defined as:
a) Scalar
product of force and displacement
b) Vector
product of force and displacement
c) Scalar
product of force and velocity
2. If two
vectors are perpendicular to each other, their dot product is:
a) Product
of their magnitude
b) Product
of their x-components
c) Zero
d) One
3. If iˆ ,
jˆ , kˆ are unit vectors along x, y and z-axes then iˆ. jˆ = jˆ. kˆ = kˆ. iˆ =?
a) 1
b) -1
c) – 21
4. iˆ. iˆ =
jˆ. jˆ = kˆ. kˆ = _______
a) 0
b) 1
c) -1
d) 21
5. If dot
product of two vectors which are not perpendicular to each other is zero, then
either of the vectors is:
a) A unit
vector
b) Opposite to the other
c) A null
vector
d) Position
vector
6. In the
vector product of two vectors A & B the direction of the product vector is:
a)
Perpendicular to A
b) Parallel
to B
c)
Perpendicular to B
d)
Perpendicular to the plane joining both A&B
Answer
Answer
7. The
cosine of an angle is negative in _______ quadrants.
a) Second and
fourth
b) Second
and third
c) First and
third
d) None of the aboveAnswer
8. If iˆ, jˆ
, kˆ are unit vectors along x, y and z-axes then kˆ . jˆ = _______
a) iˆ
b) jˆ
c) – kˆ
9. iˆ x iˆ =
jˆ x jˆ = kˆ x kˆ = _______
a) 0
b) 1
c) -1
10. kˆ x iˆ
= _______
a) jˆ
b) – jˆ
c) kˆ
d) – kˆAnswer
