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sci.inductor-energy Calculator
Calculates energy stored in an inductor E = ½LI² and voltage induced during current changes V = L × dI/dt. A 10 mH inductor carrying 5 A stores 125 mJ — when the current is interrupted, this energy releases as a voltage spike that can reach thousands of volts.
Inputs
Inductance Mh
Opposition to changing current (H). Inductors store energy in a magnetic field and cause voltage spikes when current is interrupted.
Current A
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
Frequency Hz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
Results
energy stored (J)
Sample size or count used in the calculation.
inductive reactance XL (Ω)
Sample size or count used in the calculation.
impedance at
Total opposition to AC current (Ω), combining resistance and reactance. Z = √(R² + X²). Maximum power transfer occurs when source and load impedances match.
E = ½LI²
Reference formula or conversion factor shown for context.
current
Electric charge flow rate (A). Governs wire sizing — too much current causes dangerous heating. Fuses protect circuits from overcurrent.
XL = 2πfL
Reference formula or conversion factor shown for context.