Physics Secondary School verified answered • expert verified Q. Soft iron is used to make the core of a transformer because of its: (a) low coercivity and low retentivity (b) low coercivity and high retentivity (c) high coercivity and low retentivity (d) high coercivity and high retentivity Advertisement Expert-Verified Answer question

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.

The simplest motion producer is a solenoid, which consists of a coil with a soft iron core (or armature) which slips easily in and out of the coil. Soft iron is used because it does not retain its magnetism when the current is switched off; in other words, it does not become permanently magnetized.

A simple two-winding transformer construction consists of each winding being wound on a separate soft iron limb or core which provides the necessary magnetic circuit A transformer construction provides a magnetic circuit, known more commonly as the “transformer core”, which is designed to provide a path for the magnetic field to flow around.

The characteristic properties of the material suitable for making the core of a transformer are as follows: → low coercivity and low retentivity → low hysteresis loss → High magnetic susceptibility → High permeability → High resistivity Solve any question of Alternating Current with:- Patterns of problems > Was this answer helpful? 0 0

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