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Elektronik
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Symbol
Formel
Si Einheit
Strom
I
I = DQ / Dt
1A = 1C / 1s
parallel
I0 = I1 + I2 + ... + In
seriell
I0 = I1 = I2 = ...
= In
Spannung
U
U = DW / DQ
1V = 1J / 1C
parallel
U0 = U1 = U2 = ... = Un
seriell
U0 = U1 + U2 + ...
+ Un
Widerstand
R
R = DU / DI
1W = 1V / 1A
Leitungs-
Rl
Rl = V * l / A
parallel
1 / R0 = 1 / R1 + 1 / R2 + ... + 1 / Rn
seriell
R0 = R1 + R2 + ...
+ Rn
Leistung
P
P = U * I
1W = 1V * 1A
parallel
P = P1 + P2 + ... + Pn
seriell
P = P1 + P2 + ...
+ Pn
Q : Coulomb ( C ) = -1,602e -19
Ohmsches Gesetz:
R =U / I für DI / DU = const
2 K.G.:
R1 / R2 = I2 / I1
(Parallelschaltung)
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