Question

The shortest wavelength of X-rays emitted from an X-ray tube depends on

• A. The current in tube
• B. The voltage applied to the tube
• C. The nature of the gas in tube
• D. The atomic number of the target material

Answer 1

Answer: (B)

The voltage applied to the tube

As we know,

${\lambda }_{min}=\frac{hc}{eV}$ where $h,c$ and $e$ are constants. Hence ${\lambda }_{min}\propto \frac{1}{V}$