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

Options

A. Wavelength of characteristic X-rays 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 S-rays depends on the electrical power given to the X-rays tube
D. Cut-off wavelength of the continuous X-rays depends on the energy of the electrons in the X-ray tube

Answer

B

Explanation

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