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 resulting in emission of continuous and characteristic X-rays. If the filament current $I$ is decreased to $\frac{\mathrm{I}}{2}$, the potential difference $V$ is increased to $2 V$, and the separation distance $d$ is reduced to $\frac{d}{2}$, then
Select ALL correct options:
A
the cut-off wavelength will reduce to half, and the wavelengths of the characteristic X-rays will remain the same
B
the cut-off wavelength as well as the wavelengths of the characteristic X-rays will remain the same
C
the cut-off wavelength will reduce to half, and the intensities of all the X-rays will decrease
D
the cut-off wavelength will become two times larger, and the intensity of all the X-rays will decrease
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