2001/11/06 by Avinash Singh, Y. N. Mohapatra, Satyendra Kumar · 2 citations
Physics and Astronomy · #physics.ed-ph
paper · pdf · doi:10.1119/1.1446859
published as American Journal of Physics vol. 70, 424 (2002) · 4 pages, to appear in Am. J. Phys
arxiv created 2001/11/06 · arxiv updated 2009/12/01
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.