Resonance In Torsional Pendulum - Projection

Purpose

To demonstrate quantitatively all aspects of the driven and damped oscillator.◙

Equipment

Klinger torsional resonance device, as photographed. Shadow projection available on request.

Images

g2-03

Description

Using the "gross" and "fein" controls on the power supply box the frequency of the driving force can be swept through the natural frequency of the rotator. A knob on the power supply controls a damping magnet. Driven oscillations, under-damped, over-damped, and critically damped motion can be shown, and the maximum amplitude in the presence of various damping forces can be ascertained. ◙◙Practice before demonstrating this device. It is a very inclusive machine, and can be used to illustrate most aspects of damped◙and driven oscillations discussed in intermediate mechanics texts.◙◙Do not exceed

References

Instruction Manual, Cat. No. 11 1124, Klinger Scientific Co., Jamaica, NY. ◙Lecture Demonstratio Data Sheet: Amplified vs. Motor Voltage