Question

If the period of oscillation of a simple pendulum is 4 second and we want to convert it into a second pendulum, then we have to

• A. Make the length of the pendulum one fourth of the previous length
• B. Double the length of the pendulum
• C. Make the length of the pendulum half of the previous length
• D. Double the mass of the bob

Answer 1

The correct option is A Make the length of the pendulum one fourth of the previous length

The time period of a simple pendulum is proportional to the square root of the length i.e., $T\infty \sqrt{l}$. To convert 4 second to 2 we have to make the length of the pendulum one fourth of the previous length.