| Description: |
The oscillating system of the torsional pendulum consists of a copper
wheel mounted on a ball bearing which is excited to harmonic oscillations
by means of a motor and a spiral spring. The natural frequency of the wheel
is about 0.5 Hz. The motor frequency can be continuously adjusted between
standstill and approximately 3 Hz. The wheel has markings on its periphery,
with which the amplitude can be read from a scale surrounding the wheel.
The damping of the oscillating system can be varied over a large range
by means of an electromagnet. This apparatus can perform: Determination
of the frequency of a free-damped oscillation. Observation of the consecutive
amplitudes of a free-damped oscillation. A periodic and creeping adjustment
of zero point of a free damped oscillation with appropriately adjusted
damping. Forced oscillations and their resonance characteristics at different
dampings. Phase shift between exciter and resonator and others. |