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In an X - ray tube , electrons emitted...

In an X - ray tube , electrons emitted from a filament (cathode) carrying current hit a target (anode) at a distance d form the cathode. The target is kept at a potential V higher than the cathode resulting in emission of continuous of and charateristic X - rays. It the filament current I is decreased to `(I)/(2)` , the potential difference V is increaed to 2v, and the separation distance d is reduuced to `(d)/(2)` ,then

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