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12. atoms — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics12. atoms1 Mark
MCQ
The minimum wavelength of the $X-$ rays produced by electrons accelerated through a potential difference of $V$ volts is directly proportional to
  • A
    $\sqrt V $
  • B
    ${V^2}$
  • C
    $1/\sqrt V $
  • ✓
    $1/V$
✓

Answer

Correct option: D.
$1/V$
d
$h{\nu _{\max }} = eV$

$ \Rightarrow \,\frac{{hc}}{{{\lambda _{\min }}}} = eV$

$\therefore \,\,{\lambda _{\min }} \propto \frac{1}{V}$

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