MDCAT Physics MCQ #837

A generator produces a direct current. What is the reason behind the changing magnetic field in the generator?

MDCAT Physics MCQ #837

  1. Question 1

    Q1. A generator produces a direct current. What is the reason behind the changing magnetic field in the generator?

    • A) The changing magnetic field is due to the thermal expansion of the generator.
    • B) The changing magnetic field is due to the flow of electrons in the generator.
    • C) The changing magnetic field is due to the rotation of the coil in the generator.
    • D) The changing magnetic field is due to the presence of a permanent magnet near the generator.

    Answer: The changing magnetic field is due to the rotation of the coil in the generator.

    Explanation: The changing magnetic field in the generator is due to the rotation of the coil, which induces a changing magnetic field in the stationary coil due to electromagnetic induction.