Associate CET Exam Prep

🧪 Circuits Lab

An interactive training ground for building and measuring circuits. Construct series and parallel DC circuits, change component values, and watch voltage, current, power, and resistance update live — then switch to AC to explore reactance and impedance . Ready to study for the Associate CET exam with lessons, quizzes, and a mock exam? Head to the Study Hub.

Interactive DC Circuit Simulator

Choose a circuit type, set the source voltage and resistor values, and the lab solves it instantly using Ohm's law and Kirchhoff's laws — total resistance, total current, the voltage drop and power for every resistor. This is exactly the kind of analysis the Associate CET exam expects you to do by hand.

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Circuit Analysis

Total Resistancei
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Total Currenti
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Total Poweri
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Source Voltage
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🔮 Predict the effect Test your intuition before you change the circuit
🎯 Challenges Build a circuit to hit a goal — the lab checks it live
🔧 Fault Finder Inject a fault, predict the meter reading, then probe to confirm

AC Circuit Analyzer — RC, RL & RLC

Now step up to AC. Pick a circuit type, set your component values and the source frequency, and the lab computes reactance, impedance, phase angle, and current. For RLC it also finds the resonant frequency — the frequency where XL and XC cancel. These are core Associate CET competencies (4.7, 4.8, 2.10, 2.11).

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Voltage & current waveforms ━ voltage   ━ current  

AC Analysis

Transient Response — Watch It Charge

Steady-state is only half the story. When a DC voltage is suddenly applied to a capacitor or inductor, the circuit doesn't jump instantly — it eases into place along an exponential curve. Press Charge and watch the scope draw it in real time. The time constant τ sets the pace: one τ gets you 63% of the way; five τ is essentially done. (Competencies 4.4, 4.5, 2.10.)

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Transient Analysis