Question

An x-ray generator operated at a plate voltage of 7000 V is incapable of producing Ni Kα radiation. Calculate the minimum energy required for a ballistic electron to produce Ni Kα radiation. Express your answer in units of eV.

Answer 1

lambda min = 1239.8 pm/kilovolts
You can read more about it here.
http://en.wikipedia.org/wiki/Bremsstrahlung

Answer 2

DrBob222 but its asking the energy not the wavelength,can you explain better pls?

Answer 3

7.47*10^3

Answer 4

thanks