A transformer works on the principle of
- A. self induction only
- B. mutual induction between two coils linked by a common changing flux
- C. electrostatic attraction
- D. the motor effect
Explanation
Alternating current in the primary produces a continuously changing flux, which the laminated iron core carries to the secondary, where it induces an alternating emf. Since the process depends entirely on a changing flux, a transformer cannot work on direct current. Self induction is the related effect a single coil has on itself.
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