Q.

The graph shows the observed intensity of X – rays produced from two Coolidge tubes A, and B as a function of wavelength  λ. For tube A, the potential difference between the filament and target is VA  and atomic number of target is  ZA.  For tube B the corresponding potential difference is VA  and atomic number is  ZB.  Then

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a

ZA<ZB; VA<VB

b

ZA<ZB; VA>VB

c

ZA>ZB; VA>VB

d

ZA>ZB; VA<VB

answer is B.

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Detailed Solution

λminα1VandCλ=a(Zb)

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