The Bifilar Pendulum Apparatus is a reliable physics laboratory instrument designed for studying rotational motion and determining the moment of inertia of a rigid body. It provides a practical and accurate way to demonstrate important concepts of rotational dynamics through controlled oscillations.

The apparatus includes a heavy cast iron tripod base, supporting rod, and a rectangular metal plate measuring approximately 15 × 10 × 1.5 cm. The metal plate is provided with tapped holes on multiple faces, allowing it to be suspended in different positions using the supplied torsion heads. A rigid T-shaped clamp support with split chucks holds two equal-length strings, ensuring stable suspension and smooth oscillatory motion.

This apparatus is suitable for regular use in schools, colleges, universities, and physics laboratories for experiments related to moment of inertia and rotational dynamics.

 

Experimental Objectives

To determine the moment of inertia of a body about an axis passing through its centre of gravity.
To study rotational oscillations using a bifilar suspension system.
To understand the relationship between time period, mass distribution, and moment of inertia.