If one coil is wound on an iron core, the flux through it will:
Correct answer: C. Increase
- A. Remains constant
- B. Decrease
- C. Increase
- D. Becomes zero
Explanation
When a coil is wound on an iron core, the flux through it will increase.The presence of an iron core in a coil increases the magnetic permeability of the core material. This increased permeability enhances the magnetic field strength within the core and consequently increases the magnetic flux passing through the coil.
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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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