Geometria analítica caderno de atividades enem unidade 37 módulo 5
Enem módulo 04
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ELETRICIDADE
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Transcript of Enem módulo 04
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ELETRICIDADE
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Cargas
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Lei de Coulomb
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Campo ElétricoCampo Elétrico
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Analogia com o Campo GravitacionalAnalogia com o Campo Gravitacional
g E
P Fqm -
+P = m.g F = lql.E
Carga de prova
Carga geradora
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A ddp (U) é a causa da corrente elétrica !
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+- elétronsi
Sentido convencional :
sentido de movimento das cargas positivas !
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Carga Total
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Efeitos da Corrente Elétrica
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RESISTORES
ENERGIA
ELÉTRICA
ENERGIA
TÉRMICA
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A B
1ª. Lei de OhmNos condutores metálicos, mantidos
à temperatura constante, a resistência elétrica é constante.
U
i
R
R =U
i=
2U
2 i=
3U
3 iconstante=
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LA
R = L A
Unidade SI : .m
2ª. Lei de Ohm
Resistividade o material
a temperatura
Caracteriza
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Associação em série
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Associação em paralelo
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Resistor equivalente
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