Which of the following is related to the characteristic emission of $X$-rays?

Why is a direct $X$-ray photograph of the intestines not taken by a radiologist?

The wavelength of the most energetic $X$-rays emitted when a metal target is bombarded by $40 \ keV$ electrons is approximately ....... $\mathring{A}$. $(h = 6.62 \times 10^{-34} \ J \cdot s; 1 \ eV = 1.6 \times 10^{-19} \ J; c = 3 \times 10^8 \ m/s)$

$X$-rays can be used to study crystal structure if the wavelength lies in the range:

The binding energy of the innermost electron in tungsten is $40 \text{ keV}$. To produce characteristic $X$-rays using a tungsten target in an $X$-ray tube,the potential difference $V$ between the cathode and the anti-cathode should be:

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