MDCAT Physics MCQ #2538

In an X-ray tube, the minimum wavelength (λ_min) of the emitted X-rays is related to the potential difference (V) between the cathode and anode by

MDCAT Physics MCQ #2538

  1. Question 1

    Q1. In an X-ray tube, the minimum wavelength (λ_min) of the emitted X-rays is related to the potential difference (V) between the cathode and anode by

    • A) λ_min = hc/eV
    • B) λ_min = eV/hc
    • C) λ_min = h/eV
    • D) λ_min = e/hV

    Answer: λ_min = hc/eV

    Explanation: λ_min = hc/eV is derived from the maximum energy (eV) of the electrons, which equals the photon energy (hc/λ).