Rv45 = 1 / [1/R4+1/R5] = 1/ [1/30=1/30] = 15 Ohm
Rt345 = R3 + Rv45 = 15+15 = 30 Ohm
Rv2345 =1 /[1/R2 + 1/Rt345 = 1/ [1/30 + 1/30] = 15 Ohm
Rt = R1 + Rv2345 = 20+15  = 35 Ohm
It = Ut/Rt = 35/35 = 1A
Ur1 = I1xR1 = 1x20 = 20Volt
Ur2 = U-Ur1 =35-20 = 15 Volt
I2 = Ur2/R2 = 15/30 = 0.5 A
Ir3 = It-I2 = 1-0.5 = 0.5 A
Ur3 = I3xR3 = 0.5x 15 = 7.5 Volt
Ur4 = Ur2-Ur3 = 15-7,5 = 7.5 Volt
Ur5 = Ur4 = 7.5 Volt
Ir4 = Ur4/R4 = 7.5/30 = 250 mA
Ir5 = Ur5/R5 = 7.5/30 = 250 mA

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U=I*R

009 Bereken de stromen en spanningen

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