Time of onset: In Jamaica, it begins one to 2 hours after death and takes further one to 2 hours to develop. In temperate countries, it begins in 3 to 6 hours and takes further 2 to 3 hours to develop. Duration of rigor mortis: In Jamaica, usually it lasts 18 to 24 hours in winter and 12 to 18 hours in summer.
Then by either moving the wire or changing the magnetic field we can induce a voltage and current within the coil and this process is known as Electromagnetic Induction and is the basic principal of operation of transformers, motors and generators.he changing magnetic flux in the iron core of a transformer above will induce an emf, not only in the primary and secondary windings, but also in the iron core. The iron core is a good conductor, so the currents induced in a solid iron core will be large.
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.Electromagnetic induction produces an electromotive force across a conductor which is exposed to time varying magnetic fields.ommonly, transformers are used to increase or decrease the voltages of alternating current in electric power applications. A varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core and a varying magnetic field impinging on the transformer's secondary winding.