Which one of the following statement is WRONG in the context of X-rays generated from X-ray tube?

Which one of the following statement is WRONG in the context of X-rays generated from X-ray tube?
  1. Wavelength of characteristic X-rays decreases when the atomic number of the target increases
  2. Cut-off wavelength of the continuous X-rays depends on the atomic number of the target
  3. Intensity of the characteristics X-rays depends on the electrical power given to the X-ray tube
  4. Cut-off wavelength of the continuous X-rays depends on the energy of the electrons in the X-ray tube

Solution

Cut-off wavelength depends on the applied voltage not on the atomic number of the target. Characteristic wavelengths depend on the atomic number of target.

Asked in: JEE Advanced 2008 (Paper 1)

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