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