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