The reason for having a soft iron core is that it is capable of producing internal magnetic flux densities some 10,000 (relative permeability) times stronger than in air. This is the basic principle of induction where, as engineers, we exploit the magnetic properties of the soft iron core material.

Soft iron is used to make the core of transformer because of its (A) low coercivity and low retentivity (B) low coercivity and high retentivity (C) high coercivity and high retentivity (D) high coercivity and low retentivity magnetic materials class-12 Please log in or register to answer this question. 1 Answer +1 vote

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A “step-down transformer” is used to step voltage down, while a “step-up transformer” is used to step voltage up. The voltage coming into the transformer from the power source is called the primary voltage and the voltage going out of the transformer is called the secondary voltage .

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Answer: 3. Explanation: The soft iron core increases the strength of the magnetic field inside a transformer. The main purpose of using an iron core in a transformer because iron is a magnetic material and it is easily available everywhere.

In transformers, soft iron cores are utilised because they have excellent magnetic permeability, which focuses magnetic lines of force and reduces energy loss. Is core magnetic? In a sense, yes. The Earth is composed of layers having different chemical compositions and different physical properties.