alleryStart learning →Energy stored in an inductor:
ALI²
BLI
C½ LI² (= ½ Φ²/L if linear)
DΦ I
Answer & Solution
Correct answer: C. ½ LI² (= ½ Φ²/L if linear)
**Inductor energy:** U = ½ LI².
Stored as magnetic field.
Can't change instantaneously (sudden break → high voltage from L(di/dt) → spark).
Hence diodes across coils to dissipate stored energy safely.
Analogous to capacitor with ½ CV².
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