Physics · Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance
A coil carries current. Energy stored in its magnetic field is.
A \( 100 m H \) coil carries \( 1 A \) current. Energy stored in its magnetic field is.
- A. 0.15 J \( 5.1 .5 . \)
- B. \( 0.05 J \)
- C. 0 .5 J \)
- D. \( 1 . \)
Step-by-step solution
Energy stored in an inductor is given by U = ½ L I². With L = 100 mH = 0.1 H and I = 1 A, U = 0.5 × 0.1 × 1² = 0.05 J.
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