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