BRAINCAKETransformers
A transformer consists of two coils wound around the same soft iron core. When the primary coil is connected to an alternating p.d. and alternating magnetic field is generated in the soft iron core. The flux linkage in the secondary coil alternates with the magnetic field and the change in flux linkage generates an e.m.f. in the secondary coil. All the magnetic flux produced by the primary coil passes through the secondary coil.
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Key terms in this lesson
- magnetic field
- A region of space in which a moving charge, current-carrying conductor or magnetic material experiences a force.
- magnetic flux
- The product of the magnetic flux density and the area through which the field lines pass at right angles.
More in Electromagnetic Induction
- Solenoid
- Lenz's Law
- Faraday's Law of Electromagnetic Induction
- The Alternating Current Generator
- Power Station Alternators
- Back e.m.f.
- Transformer Efficiency
- The National Grid
All 12 lessons in Electromagnetic Induction · All OCR A-level Physics topics