Parallel Circuits Model  

In this model, students can observe what happens to the current, voltage and power output of a circuit as more resistors are added in parallel.

THE MODEL
Vensim Version STELLA Version

[Diagram Level | Equations Level | Graphs ]



Total_Charge(t) = Total_Charge(t - dt) + (Current) * dt
INIT Total_Charge = 0

Current = Applied_Voltage/Total_Resistance
Applied_Voltage = 12

I1 = Applied_Voltage/R1
I2 = if R2=0 then 0 else Applied_Voltage/R2
I3 = if R3=0 then 0 else Applied_Voltage/R3

P1 = Applied_Voltage*I1
P2 = Applied_Voltage*I2
P3 = Applied_Voltage*I3

Power = Applied_Voltage*Current

R1 = 2
R2 = 0
R3 = 0

Total_Resistance = if (R2=0 and R3 = 0) then R1 else if R3 =0 then 1/(1/R1 + 1/R2) else if R2=0 then 1/(1/R1 + 1/R3) else 1/(1/R1 + 1/R2 + 1/R3)

Time Specs
Range = 0 - 12, dT = 0.1, Integration Method = Euler's







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