MDCAT Physics MCQ #63

A step-down transformer is used to decrease voltage. Why are the primary and secondary coils wound on a soft iron core instead of steel?

MDCAT Physics MCQ #63

  1. Question 1

    Q1. A step-down transformer is used to decrease voltage. Why are the primary and secondary coils wound on a soft iron core instead of steel?

    • A) Soft iron has lower hysteresis loss per cycle.
    • B) Soft iron increases the magnetic flux density.
    • C) Soft iron conducts electricity better than steel.
    • D) Soft iron provides a longer path for magnetic field lines.

    Answer: Soft iron has lower hysteresis loss per cycle.

    Explanation: Soft iron's low hysteresis loss reduces energy waste. B is incorrect because flux density depends on current, not core material.