# Physics Vector Chapter Important MCQs For ETEA

1) If two vectors A and B are parallel to each other than A.B is

- Zero
- AB
- AB Cos
- A
^{2}

2) If two vectors are parallel to each other than A*B is

- Zero
- AB
- AB Cos
- A
^{2 }

3) The minimum number of the equal vectors whose sum is ………..

- Two
- Three
- Four
- Zero

4) Vector product does not obey ………….. law.

- Commutative
- Associative
- None

5) The angle between X-axis and –X-axis is ………

- 0
- 90
- 180
- 360

6) If the direction of vectors A*B is along X-axis then vector A and B lies in …………….. plane

- X-Y plane
- Y-Z plane
- Z-X plane
- X-Z plane

7) ……………. Is an example of a scalar product

- Velocity
- Torque
- Speed
- Momentum

8) ……………. Is an example of central force

- Weight
- Reaction
- F
_{c }=mv^{2 }/r - Both ‘a’ and ‘c’

9) There can be ………………. Rectangular component of a vector in the X-Y plane

- 2
- 3
- Infinite
- Zero

10) If vector A is negative of B then A + B = ………..

- Null Vector
- Unit Vector
- Both

11) The magnitude of resultant of two vectors is least when the angle between them is

- Zero
- 90
- 180
- 360

12) If two vectors are anti-parallel then their resultant is ……….

- A + B
- A – B
- B – A
- None

13) If Ax and Ay both are negative then the resultant lies in …………… quadrant.

- 1
^{st} - 2
^{nd} - 3
^{rd} - 4
^{th}

14) A vector lies on Y-axis its X-axis will be

- Zero
- Non zero
- Positive
- Negative

15) Rectangular component if vectors are……………. to each other.

- Parallel
- Perpendicular
- Opposite

16) In static equilibrium, a body will be in …………

- Rest
- Motion
- Vibration
- Turning

17) Which one of the following is not a central force ………….

- Centripetal
- Centrifugal
- Weight
- Spring force

18) The addition is the reverse process of

- Resolution of vector
- Multiplication of vector
- Direction of vector
- All of the above

19) The magnitude of Null vectors is ……….

- Zero
- 1
- Both

20) The sum of a vector to its negative vector is a ……….. Vector.

- Unit
- Null
- Positive
- Negative

21) Which one is a derived quantity?

- Area
- Length
- Time
- Mass

22) [MLT^{-2}] is dimension of ……..

- Velocity
- Force
- Speed
- Acceleration

23) 1053 can be written in significance notation

- 05*10
^{3} - 105* 10
^{3 } - 1053*10
^{3 } - 05*10
^{-3 }

24) A light-year is a unit of ……….

- Light
- Time
- Distance
- Momentum

25) A plane angle is measured in

- Ste-radians
- Radians
- Degree
- Two dimension

26) The unit of solid angle is ……………

- Radian
- Degree
- Ste Radian
- None

27) Which of the following pair has the same dimension

- Speed and velocity
- Velocity and acceleration
- Acceleration and force
- Force and speed

28) The supplementary units are …………….. in numbers.

- 2
- 4
- 3
- None

30) The least count of meter rod is …………..

- Meter
- Millimeter
- Centimeter
- None

30) A number expressed in standard form is called ……………

- Scientific notation
- Algebraic notation
- Set builder notation
- None

For ETEA preparation 2019 Give the Following Online Test