1. Tardigrade
  2. Question
  3. Physics
  4. A potential difference of 20 kV is applied across an X- ray tube. The minimum wavelength of X- rays generated (in angstrom) is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A potential difference of $20 \,kV$ is applied across an $X$- ray tube. The minimum wavelength of $X$- rays generated (in angstrom) is

UP CPMTUP CPMT 2010Atoms

Solution:

For $X$ -rays production
$\frac{hc}{\lambda_{min}}=eV $
$\lambda_{min}=\frac{hc}{eV}$
$=\frac{6.63\times10^{-34}\times3\times10^{8}}{1.6\times10^{-19}\times20\times10^{3}}$
$=0.62\times10^{-10}\,m$
$=0.62\, \mathring{A}$