Q. The bob of a simple pendulum is a spherical hollow ball filled with water. A plugged hole near the bottom of the oscillating bob gets suddenly unplugged. During observation, till water is coming out, the time period of oscillation would
A) First increase and then decrease to the origin value
B) First decrease and then increase to the origin value
C) Remain unchanged
D) Increase towards a saturation value
Explanation
(a) [image:14_image79.emf]
and $T_{1} > T_{2}$
Hence, time period first increases and then decreases to the original value.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.