## What is the aim of torsional pendulum experiment?

NO. 1: TORSIONAL PENDULUM OBJECTIVE: To find the modulus of rigidity (η) and torsional rigidity (C) of the given string.

**What is torsional pendulum?**

a pendulum the weight of which is rotated alternately in opposite directions through a horizontal plane by the torsion of the suspending rod or spring: used for clocks intended to run a long time between windings.

**What is torsional pendulum PDF?**

The torsional pendulum consists of a disc of mass ‘m’ and the thin bar which oscillates around the axis of string. The continuous twisting and releasing of the string/rod create oscillation in the torsional pendulum. This mechanism creates simple harmonic motion in the torsional pendulum.

### What is torsional pendulum explain how it is used to determine the moment of inertia and rigidity modulus of the material of the thin wire?

A torsion pendulum is an oscillator for which the restoring force is torsion. Rigidity modulus or shear modulus is the ratio of shear stress to the displacement per unit sample length. When a circular disc is suspended through a wire, it undergoes torsion or coupling effect.

**What are the applications of torsional pendulum?**

Torsion pendulums are often used for time-keeping purposes. For instance, the balance wheel in a mechanical wristwatch is a torsion pendulum in which the restoring torque is provided by a coiled spring.

**How does a torsion pendulum clock work?**

The torsion pendulum rotates about the vertical axis of the wire, twisting it, instead of swinging like an ordinary pendulum. The force of the twisting torsion spring reverses the direction of rotation, so the torsion pendulum oscillates slowly, clockwise and counterclockwise.

#### What is compound pendulum and torsional pendulum?

Compound or Physical Pendulum – A rigid body suspended from a fixed horizontal axis. Torsional Pendulum – A disk fixed to a slender rod. The rod is fastened to a fixed frame. If the disk is twisted it will oscillate back and forth about the axis of the rod.

**How is torsional pendulum different from simple pendulum?**

Answer: A torsional pendulum is an oscillator for which the restoring force is torsion. In a simple pendulum, the oscillating mass has dimensions much smaller than the distance between the axis of suspension and the centre of gravity. A torsional pendulum is an oscillator for which the restoring force is torsion.

**What is the difference between simple pendulum and torsional pendulum?**

In a simple pendulum, the oscillating mass has dimensions much smaller than the distance between the axis of suspension and the centre of gravity. A torsional pendulum is an oscillator for which the restoring force is torsion.

## What is rigidity modulus in torsional pendulum?

**How torsional pendulum was useful in determining the rigidity modulus?**

A torsion pendulum is an oscillator for which the restoring force is torsion. Rigidity modulus or shear modulus is the ratio of shear stress to the displacement per unit sample length. This effect is used to determine the rigidity modulus of the suspended wire.