Atoms and Nuclei

Section: Physics

Question : 11 of 51

Marks: +1, -0

In an X-ray tube, electrons emitted from a filament (cathode) carrying current I hit a target (anode) at a distance d from the cathode. The target is kept at a potential V higher than the cathode resultingin emission of continuous and characteristic X-rays. If the filament current I is decreased to

, thepotential difference mathrm‌V is increased to 2 V, and the separation distance d is reduced to

, then

[JEE Adv 2020 P2]

the cut-off wavelength will reduce to half, and the wavelengths of the characteristic X-rays will remain the same
the cut-off wavelength as well as the wavelengths of the characteristic X-rays will remain the same
the cut-off wavelength will reduce to half, and the intensities of all the X-rays will decrease
the cut-off wavelength will become two times larger, and the intensity of all the X-rays will decrease

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