A technician connects an alternating current (AC) power source to the primary winding of an iron-core transformer to power a low-voltage circuit. Which of the following statements correctly explains how electrical energy is transferred from the primary winding to the secondary winding?
- AThe primary coil stores electrical energy in an electrostatic field between the windings, which discharges periodically into the secondary circuit.
- The alternating current in the primary winding creates a dynamic magnetic field that cuts across the secondary winding, inducing an alternating voltage through mutual induction.Cevap
- CA steady direct current magnetizes the iron core, enabling electrons to physically conduct through the core material into the secondary winding.
- DHigh primary voltage forces electrons to ionize the insulation and jump across the air gap directly into the secondary conductors.
Cevap
The alternating current in the primary winding creates a dynamic magnetic field that cuts across the secondary winding, inducing an alternating voltage through mutual induction.
Energy transfer in a transformer occurs via mutual induction. When alternating current flows through the primary winding, it produces a continuously changing magnetic flux. This flux travels through the ferromagnetic core and links with the secondary winding, inducing an alternating voltage across the secondary terminals according to Faraday's Law of Induction without requiring any direct electrical connection.
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Mutual Induction in Transformers
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