The energy can be stored in the:
Correct answer: A. Magnetic field of an inductor
- A. Magnetic field of an inductor
- B. Electric field of the capacitor
- C. Magnetic field of the capacitor
- D. Both (a) and (b)
Explanation
When a current flows through an inductor, it generates a magnetic field around it according to Ampere's law. This magnetic field stores energy. The energy stored in this magnetic field is proportional to the square of the current flowing through the inductor and inversely proportional to its inductance. Mathematically, the energy stored (Um ) in an inductor with inductance L and current I flowing through it can be expressed as Um =1/2 LI2.
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About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
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