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Energy Stored in Electric Fields
Inside this lesson
- Compute the energy stored in a capacitor using U = ½CV², ½Q²/C, and ½QV
- Derive the electric energy density u = ½ε₀E² from the parallel-plate capacitor
- Verify that integrating u over the field volume reproduces the ½CV² result exactly
- Explain why physicists say the energy lives in the field, not on the charges
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Educational content covering topics typical of a first- and second-year electrical engineering curriculum. Not a substitute for accredited coursework, and not suitable for real antenna, transmission-line, or signal-processing system design without review by a licensed professional engineer.