Question

Moment of inertia of a fan is $ 0.06kg-{{m}^{2}} $ . If its angular speed is increased from 0 to 5 revolution/sec. Then its maximum angular momentum in M.K.S. unit is:

• A. $ 0.3\,\pi $
• B. $ 0.6\,\pi $
• C. $ \frac{0.03}{\,\pi } $
• D. $ \frac{0.6}{\,\pi } $

Answer 1

Answer: (B)

Angular momentum $ J=I\omega $ $ J=I.\,\,2\pi n=0.6\times 2\pi \times 5=0.6\pi $