$\definecolor{red}{RGB}{255,0,0}$$\definecolor{black}{RGB}{0,0,0}$
  1. R
  2. R
  4. R
    • 1/R  =   1/R1+1/R2
    • R  =   U / I
  1. R1
  2. R1
  4. R1
    • 1/R1  =   1/R-1/R2
    • R1  =   U/I1
  1. R2
  2. R2
  4. R2
    • 1/R2  =   1/R-1/R1
    • R2  =   U/I2
  1. I
  2. I
  4. I
    • I  =   I1+I2
    • I  =   U / R
  1. I1
  2. I1
  4. I1
    • I1  =   I-I2
    • I1  =   U / R1
  1. I2
  2. I2
  4. I2
    • I2  =   I-I1
    • I2  =   U / R2
  1. U
  2. U
  4. U
    • U  =   R·I
    • U  =   R1·I1
    • U  =   R2·I2
: Parallel resistors, equivalent resistance

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