1. Circuito RLC em série - Ressonância

2. Potência em Circuitos de Corrente Alternada

4. Circuito RLC em paralelo
ε (t ) = ε m sen(ωt ) i (t ) = im sen(ωt + ϕ )
Lei dos nós: i (t ) = iR (t ) + iC (t ) + iL (t )
εm
VR (t ) = RiR (t ) = ε m senωt iR (t ) = senωt
R
VC (t ) =
q C (t ) dqC
= ε m senωt qC (t ) = Cε m senωt iC (t ) = = ωCε m cos ωt
C dt
diL (t ) ε m εm εm
VL (t ) = L
diL (t )
= ε m senωt = senωt iL (t ) = ∫ senωtdt = − cos ωt
dt dt L L ωL
εm εm  π εm  π
iR (t ) = senωt iC (t ) = sen ωt +  iL (t ) = sen ωt − 
R XC  2 XL  2

5. εm εm  π εm  π
iR (t ) = senωt iC (t ) = sen ωt +  iL (t ) = sen ωt − 
R XC  2 XL  2
+ (iCm − iLm )
2
im = i
2
2
1  1 1 
Rm im = ε m 2
+
 − 

R  XC X L 
−1 / 2
εm  1  1 1  
2
im = ⇒Z =  + −  
Z  R2  X C X L  
  

εm 1X − 1X 
 
iCm − iLm  L  1 1 
tgϕ = = C
= R
 − 

iRm εm  XC X L 
R