An inductor may store energy in ________________?
Correct answer: C. Its magnetic field
- A. Its electric field
- B. Its coils
- C. Its magnetic field
- D. Both electric and magnetic fields
Explanation
An inductor stores energy in the magnetic field produced by current through its coils. Its stored energy is E = 1/2 LI², where L is in henries, I is in amperes, and E is in joules. Students may choose b because the coil is the physical part involved, but the energy is stored in its magnetic field, not in the metal itself.
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About AC Through Resistor, Capacitor and Inductor
Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.
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