alleryStart learning →What is the energy stored in the magnetic field of a coil of inductance L carrying current i?
AL i^2
BL i^2 / 2
CL i / 2
DL^2 i / 2
Answer & Solution
Correct answer: B. L i^2 / 2
Integrating L i di from zero to i gives U = L i^2 / 2.
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