Capacidores Flashcards

1
Q

Equação do capacitor

A

Q = C.U

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2
Q

Campo Elétrico no interior do capacitor

A

E= Sig/Eo = Q/A.Eo

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3
Q

Tensão no capacitor

A

U = Q.d/A.Eo

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4
Q

Capacitância

A

Eo.A/d

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5
Q

Capacitores em série (mesma carga)

A

Ueq = U1 + U2 + U3
1/Ceq = 1/C1 + 1/C2 …

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6
Q

Capacitores em paralelo (Mesma tensão)

A

Qeq = Q1 + Q2 …
Ceq = C1 + C2…

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7
Q

Energia armazenada no capacitor

A

E = U.q/2

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8
Q

Trabalho gasto para inserir dieletrico

A

Trabalho = Ef-E0

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9
Q

Carga e Descarga

A

•ao carregar um capacitor i é máxima em t=0, capacitor fio liso, em t = infinito , corrente 0, se comporta como chave aberta

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10
Q

Capacitância da casca metálica

A

V = KQ/R = 1/4.pi.Eo=Q/R

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11
Q

Capacitância da carga metálica

A

C = 4.pi.Eo=R/K

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12
Q

Força entre placas dos capacitores

A

E = Q/Eo.A
F=E+.Q=Q^2/2Eo.A

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