Current Divider Calculator
Two-Resistor Current Divider
I1 = IT × R2 / (R1 + R2)
Three-Resistor Current Divider
Calculate branch currents for three parallel resistors
Formula
Two resistors: I1 = IT × R2/(R1+R2) | I2 = IT × R1/(R1+R2) | General: In = IT × (Rp/Rn) | Rp = 1/(1/R1 + 1/R2 + ...)
Frequently Asked Questions
What is a current divider?
A current divider is a circuit with parallel resistors where the total current splits into branch currents inversely proportional to the resistance. Higher resistance branches carry less current. The formula for two resistors: I1 = IT × R2/(R1+R2).
How does a current divider differ from a voltage divider?
A voltage divider uses series resistors and divides voltage proportionally to resistance. A current divider uses parallel resistors and divides current inversely proportional to resistance. In a current divider, the smaller resistor carries more current.
What is the general current divider formula for N resistors?
For N parallel resistors: In = IT × (Rtotal_parallel / Rn), where Rtotal_parallel = 1/(1/R1 + 1/R2 + ... + 1/Rn). Alternatively: In = IT × (Gn/Gtotal), where G is conductance (1/R).
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