MDCAT Physics MCQ #95

Why does a metal detector alarm trigger when a conductive object passes through?

MDCAT Physics MCQ #95

  1. Question 1

    Q1. Why does a metal detector alarm trigger when a conductive object passes through?

    • A) Object absorbs detector's magnetic field
    • B) Eddy currents induce opposing field
    • C) Object reflects radio waves
    • D) Metal increases dielectric constant

    Answer: Eddy currents induce opposing field

    Explanation: Eddy currents create a detectable magnetic interference. Option A ignores electromagnetic induction principles.