**A. 1000 mm**

B. 100 mm

C. 0.01 mm

D. 0.001 mm

12. The unit of weight in M.K.S system is

**A. Newton**

B. Dyne

C. Erg

D. None of These

13. Which of the following is a scalar quantity.

**A. Energy**

B. Velocity

C. Force

D. Torque

14. Which is the vector quantity.

A. Density

B. Charge

**C. Impulse**

D. Work

15. A vector which has magnitude one is called

A. Null vector

B. Position vector

**C. Unit vector**

D. None of these

16. The angle between two rectangular components of a vector is

A. 30’

B. 60’

C. 180’

**D. 90’**

17. A force of 6 N is acting along x-axis. Its y-Component is

A. 6 N

**B. Zero**

C. 12 N

D. 3 N

18. Time is example of

A. Vector

**B. Scalar**

C. Negative of a vector

D. Null vector

19. Torque is the product of

A. Mass and acceleration

B. Force and mass

C. Mass and velocity

**D. Force and vertical distance of force from axis of rotation.**

20. One Revolution is equal to

**A. 360**

B. 180

C. 90

D. 270

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