Elektronik

Größe

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

W = 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