AC transformers

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorBlinder, S. M.-
Data de aceite: dc.date.accessioned2019-08-21T19:15:55Z-
Data de disponibilização: dc.date.available2019-08-21T19:15:55Z-
Data de envio: dc.date.issued2008-10-08-
Data de envio: dc.date.issued2008-10-08-
Data de envio: dc.date.issued2008-10-08-
Data de envio: dc.date.issued2008-09-22-
Fonte completa do material: dc.identifierhttp://objetoseducacionais2.mec.gov.br/handle/mec/6028-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/487632-
Descrição: dc.descriptionAn electrical transformer is a device to change the voltage and amperage of alternating currents. In the simple design shown here, primary wire coils (blue) and secondary coils (red) are wound around a ferromagnetic core. An alternating current in the primary circuit creates a time-dependent magnetic field in the core, which, in turn, induces an alternating current in the secondary circuit, via Faraday's law of electromagnetic induction. The respective rms voltages are in the same ratio as the numbers of turns: . If , this acts as a step-down transformer. Long-distance transmission lines use high voltage and low currents to minimize energy losses. A sequence of step-down transformers then reduces the voltage to household levels (120 volts in the U.S.). If the secondary resistance and induction are negligibly small (simplified model), the primary and secondary currents are given by the reciprocal relation If the load resistance and inductance are taken into account, the secondary current is affected by the impedance of the circuit. Details of the magnitude of are omitted in this elementary discussion, except to note that the secondary voltage and current are no longer in phase, the current leading the voltage by the phase angle-
Descrição: dc.descriptionComponente Curricular::Ensino Médio::Física-
Idioma: dc.languageen-
Publicador: dc.publisherThe Wolfram Demonstrations Project-
Relação: dc.relationACTransformers.nbp-
Relação: dc.relationoai:handle/mec/15376-
Direitos: dc.rightsDemonstration freeware using Mathematica Player-
???dc.source???: dc.sourcehttp://demonstrations.wolfram.com/ACTransformers/-
Palavras-chave: dc.subjectTransforming-
Palavras-chave: dc.subjectBobbin-
Palavras-chave: dc.subjectModalidade::Educação de Jovens e Adultos - 2º ciclo::Ciências Naturais::Visões de mundo-
Palavras-chave: dc.subjectEducação Básica::Ensino Médio::Física::Equipamentos elétricos e telecomunicações-
Título: dc.titleAC transformers-
???dc.description2???: dc.description2The simulator allows to vary the number of returns in the main bobbin or the secondary one of a transforming one. Choosing the voltage, the chain and the frequency in the main bobbin the simulator sample, by means of graph the voltage in the secondary bobbin, as well as the imbalance of phase between chains-
???dc.description3???: dc.description3This demonstration needs the "MathematicaPlayer.exe" to run. Found in http://objetoseducacionais2.mec.gov.br/handle/mec/4737-
Aparece nas coleções:Repositório Institucional - MEC BIOE

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