MDCAT Physics MCQ #2578

A particle's position is measured with uncertainty Δx. What formula bounds its momentum uncertainty?

MDCAT Physics MCQ #2578

  1. Question 1

    Q1. A particle's position is measured with uncertainty Δx. What formula bounds its momentum uncertainty?

    • A) Δp ≥ ħ/(2Δx)
    • B) Δp ≥ ħ/Δx
    • C) Δp ≥ 2ħ/Δx
    • D) Δp ≥ ħ²/Δx

    Answer: Δp ≥ ħ/(2Δx)

    Explanation: Heisenberg's principle uses ħ/2. Option B doubles the threshold.