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B
B22μ20
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C
2B2μ0
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D
B2μ0
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Solution
The correct option is AB22μ0 Energy stored in an inductor =12LI2
This energy is actually stored in the magnetic field generated by the current flowing through the inductor. In a pure inductor, the energy is stored without loss, and is returned to the rest of the circuit when the current through the inductor is ramped down, and its associated magnetic field collapses.