Question

If the potential difference of Coolidge tube producing X-ray is increased, then choose the correct option(s).

Here ${\lambda }_0$ is cutoff wavelength and ${\lambda }_{k\alpha }and\lambda k\beta$ are wavelength of $k_{\alpha }and{k}_{\beta }$ characteristic X-rays.

• A. the interval between ${\lambda }_{k\alpha }and{\lambda }_{k\beta }increases$
• B. the interval between ${\lambda }_{k\alpha }and{\lambda }_{0}increases$
• C. the interval between ${\lambda }_{k\beta }and{\lambda }_{0}increases$
• D. ${\lambda }_0$ does not change

Answer 1

Answer: (B), (C)

The correct options are
B the interval between ${\lambda }_{k\alpha }and{\lambda }_{0}increases$
C the interval between ${\lambda }_{k\beta }and{\lambda }_{0}increases$

As ${\lambda }_0=\frac{hc}{eV}$ and as V increases. ${\lambda }_0$ decreases but characteristic wavelengths do not change so interval between ${\lambda }_{k\alpha }$ & ${\lambda }_0$ increases and the same for the interval between ${\lambda }_{k\alpha }$ & ${\lambda }_0$