1.

What kV  potential is to be applied on X-ray tube so that minimum wavelength of emitted  X-rays may be 1Å (\[h=6.625\times {{10}^{-34}}\]J-sec)                                                                      [UPSEAT 1999]

A. \[12.42\,kV\]
B. \[12.84kV\]
C. \[11.98kV\]
D. \[10.78kV\]
Answer» B. \[12.84kV\]


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