R, L and C on AC
R, L and C on AC is an interactive experiment in Alternating Current, a free simulation from StudyFi Lab that runs right in your browser.
In a resistor the current is in phase with the voltage. In a coil the current lags 90° behind the voltage, and its reactance X_L = 2πfL grows with frequency. In a capacitor the current leads the voltage by 90°, and its reactance X_C = 1/(2πfC) falls with frequency. The current amplitude is I = U/X.
Try this: Choose the capacitor and raise the frequency: X_C drops, so the current grows. Then try the same with the coil.
Frequently asked questions
What does the “R, L and C on AC” experiment show?
In a resistor the current is in phase with the voltage. In a coil the current lags 90° behind the voltage, and its reactance X_L = 2πfL grows with frequency. In a capacitor the current leads the voltage by 90°, and its reactance X_C = 1/(2πfC) falls with frequency. The current amplitude is I = U/X.
How do I try “R, L and C on AC”?
Choose the capacitor and raise the frequency: X_C drops, so the current grows. Then try the same with the coil.
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