An x-ray tube has three main controls. (i) the target material (its atomic number z (ii) the filament current If and (iii) the acceleration voltage (V) .Figure shows a typical intensity distribution against wavelength. Which of the following is incorrect?
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a
The limit λmin is proportional toV-1
b
The sharp peak shifts to the right as Z in increased
c
The penetrating power of X ray increases if V increased
d
The intensity everywhere increases if filament current If is increased
answer is B.
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Detailed Solution
for continuous X ray cutoff wavelength hcλ=eV and intensity of the continuous X ray increases if filament current increases but frequency of the characteristic X ray ν is proportional to Z so as z increases λ decreases so it shifts towards left.