Which one of the following statements is wrong in the context of X-ray generated from and X-ray tube?
(a) Wavelength of characteristic X-ray decreases when the atomic number of the target increases
(b) Cut off wavelength of the continuous X-rays depends on the atomic number of the target
(c ) intensity of the characteristic X-rays depends on the electrical power given to the x-ray tube
(d) cut off wavelength of the continuous X-rays depends on the energy of the electrons in the X-ray tube

Options

A. Wavelength of characterstics X-ray decreases when the atomic number of the target increases
B. Cut-off wavelength of the continuous X-rays depends on the atomic number of the target
C. Intensity of the characteristic X-rays depends on the elecreical power given to the X-ray tube
D. Cut-off wavelength of the continuous X-ray depends on the energy of the electrons in the X-ray tube

Answer

B

Explanation

`lambda_(min)=(hc)/(eV)`
Cut off wavelength depends on the energy of the accelerated electrons and is independent of nature of target.
`lambda_(kalpha)prop(1)/((z-b)^(2))` characterstic wavelength depend on atomic no and cut off wavelength depend on energy of `e^(-)`