MDCAT Physics MCQ #78

Why can’t a transformer operate with DC input?

MDCAT Physics MCQ #78

  1. Question 1

    Q1. Why can’t a transformer operate with DC input?

    • A) DC produces a steady magnetic field with no change.
    • B) DC causes overheating in the core.
    • C) DC increases the number of turns per coil.
    • D) DC generates electromagnetic radiation.

    Answer: DC produces a steady magnetic field with no change.

    Explanation: Transformers rely on changing magnetic fields (Faraday’s law). B is incorrect because DC causes core saturation, not overheating.