Electromagnetic induction and damping - quantitative experiments using PC interface

Abstract

A bar magnet, attached to an oscillating system, passes through a coil periodically, generating a series of emf pulses. A novel method is described for the quantitative verification of Faraday's law which eliminates all errors associated with angular measurements, thereby revealing delicate features of the underlying mechanics. When electromagnetic damping is activated by short-circuiting the coil, a distinctly linear decay of oscillation amplitude is surprisingly observed. A quantitative analysis reveals an interesting interplay of the electromagnetic and mechanical time scales.

4 pages, to appear in Am. J. Phys

Cited by in corpus (5)

• Testing theoretical models of magnetic damping using an air track
• Determination of the magnetic moment of a magnet by letting it fall through a conducting pipe
• Study of the effect of electromagnetic damping force on a magnet oscillating near a non-ferromagnetic conducting plate
• Initial-amplitude dependence in weakly damped oscillators
• Study of the Damped Pendulum