Modern Physics 4 Question 22
23. Statement I If the accelerating potential in an X-ray tube is increased, the wavelengths of the characteristic X-rays do not change
(2007, 3M)
Statement II When an electron beam strikes the target in an X-ray tube, part of the kinetic energy is converted into $X$-ray energy.
Objective Question II (One or more correct option)
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Solution:
- Cut-off wavelength depends on the accelerating voltage, not the characteristic wavelengths. Further, approximately $2 %$ kinetic energy of the electrons is utilised in producing $X$-rays. Rest $98 %$ is lost in heat.
