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Kapittel 2 · Energi og effektenergy and power

Energy in an Inductor: Why It's One Half L I Squared

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Energy stored in an inductor — ramping current builds a magnetic field; the work integral ∫v·i dt collapses to ½LI² via Φ = L·I, giving the three equivalent forms ½LI², ½ΦI, and Φ²/(2L)

inductormagnetic energyflux linkageself-inductance½LI²
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