I = V / R
P = V · I = I 2 · R = V 2 / R
V T = V 1 + V 2 + V 3 + ...
I T = I 1 = I 2 = I 3 = ...
R T = R 1 + R 2 + R 3 + ...
1 / C T = 1 / C 1 + 1 / C 2 + 1 / C 3 + ...
L T = L 1 + L 2 + L 3 + ...
V T = V 1 = V 2 = V 3 = ...
I T = I 1 + I 2 + I 3 + ...
1 / R T = 1 / R 1 + 1 / R 2 + 1 / R 3 + ...
C T = C 1 + C 2 + C 3 + ...
1 / L T = 1 / L 1 + 1 / L 2 + 1 / L 3 + ...
V 1 = V T ⋅ R 1 / ( R 1 + R 2 + R 3 + ...)
I 1 = I T ⋅ ( R 2 + R 3 + ... ) / ( R 1 + R 2 + R 3 + ...)
Vooluahela pingelanguste summa on null:
∑ V i = 0
Mitme vooluahela elemendi ristmikku nimetatakse sõlmeks .
Sõlmes olevate voolude väärtuste summa on null:
C = Q / V
C = ε ⋅ A / l
ε on läbitavus faradides meetri kohta (F / m).
ε = ε 0 ⋅ ε r
ε 0 on vaakumi läbilaskvus.
ε r on suhteline läbilaskvus või dialektiline konstant.
I C (t) = C d V C (t) / dt
V C (t) = V C (0) + 1 / C ∫ I C (t) ⋅ dt
V L (t) = L d I L (t) / dt
I L (t) = I L (0) + 1 / L ∫ V L (t) ⋅ dt
W C = C⋅V 2 /2
W L = L⋅I 2 /2