RL-Schaltkreis

How to use it

1. Inductance L = 0.5 H, Resistance R = 25 Ω
2. Time constant: Ï„ = L ÷ R = 0.5 ÷ 25
3. Ï„ = 0.02 seconds (20 milliseconds)
4. Final current with 10V: I = 10 ÷ 25 = 0.4 ZU

Common mistakes

• ⚠️ Confusing RL with RC time constant formula
• ⚠️ Not understanding that current reaches 63% in one time constant
• ⚠️ Forgetting that inductor opposes current change

Worked example

Berechnette the time constant and final current for an RL circuit with L=0.5 H and R=25 Ω

The time constant {tau} s determines how fast current reaches final value {current_final} ZU

Input guide