Q. The ratio of the angular speed of minutes hand and hour hand of a watch is
A) 6 : 1
B) 12 : 1
C) 1 : 6
D) 1 : 12
Explanation
(b) Angular speed of minute hand,
$\omega_{m} = \frac{2\pi}{60 \times 60}$ rad $s^{- 1}$
Angular speed of hour hand,
$\omega_{h} = \frac{2\pi}{12 \times 60 \times 60}$ rad $s^{- 1}$
$\therefore\ \frac{\omega_{m}}{\omega_{h}} = 12$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.