MDCAT Physics MCQ #852

A doctor uses a magnetic resonance imaging (MRI) machine to diagnose a patient's injuries. What is the principle behind the functioning of an MRI machine?

MDCAT Physics MCQ #852

  1. Question 1

    Q1. A doctor uses a magnetic resonance imaging (MRI) machine to diagnose a patient's injuries. What is the principle behind the functioning of an MRI machine?

    • A) Electromagnetic induction causing electrical currents in the body
    • B) Magnetic fields causing water molecules to rotate in the body
    • C) Electromagnetic waves causing electrical currents in the body
    • D) Ultrasonic waves causing tissue disruption

    Answer: Magnetic fields causing water molecules to rotate in the body

    Explanation: Magnetic fields cause water molecules to rotate in the body, which is detected and used for imaging, whereas the other options describe different principles used in other medical imaging or diagnostic techniques.