Question:medium

When 0.50AA X-rays strike a material, photoelectrons from the K shell are observed to move in a circle of radius 23mm in a magnetic field of 2×10⁻2T acting perpendicular to the direction of emission. What is the binding energy of K-shell electrons?

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In photoelectric problems: • Use magnetic field motion to find kinetic energy. • Binding energy = photon energy – kinetic energy.
Updated On: Mar 20, 2026
  • \(3.5\,\text{keV}\)
  • \(6.2\,\text{keV}\)
  • \(2.9\,\text{keV}\)
  • 5.5keV
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The Correct Option is B

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