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PRACTICE / Inductor energy

Energy carried by the magnetic field

An ideal 0.20 H inductor carries 3 A.

Find its stored magnetic energy.

Organize the givens & assumptions
  • L = 0.20 H
  • I = 3 A

Ideal linear inductor of constant inductance; no core losses or winding resistance in stored-energy calculation.

  1. A0.30 J0.30\ \mathrm J
  2. B0.90 J0.90\ \mathrm J
  3. C1.8 J1.8\ \mathrm J
  4. D0.60 J0.60\ \mathrm J

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