question_answer

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 [AIEEE 2005]

A)  first increase and then decrease to the original value

B)  first decrease and then increase to the original value

C)  remain unchanged

D)  increase towards a saturation value

Correct Answer: A

Solution :

1. [a] Situations are given in figures

2.

3.

4. Spherical hollow ball,

5. and

6.

7. The time period is first increases and then decreases to its original value.