In producing $X$-rays,a beam of electrons accelerated by a potential difference $V$ is made to strike a metal target. For what value of $V$ will the $X$-rays have the lowest wavelength of $0.3094 \ \mathring{A}$? (in $kV$)

The $K_{\alpha}$ characteristic $X$-ray refers to the transition:

Which one of the following statements is $WRONG$ in the context of $X$-rays generated from an $X$-ray tube?

An $X$-ray tube produces a continuous spectrum of radiation with its shortest wavelength of $45 \times 10^{-2} \text{ Å}$. The maximum energy of a photon in the radiation in $eV$ is (in $27,500$). $(h = 6.62 \times 10^{-34} \text{ J-s}, c = 3 \times 10^8 \text{ m/s})$.

The potential difference applied to an $X$-ray tube is $5 \ KV$ and the current through it is $6.4 \ mA$. The number of electrons striking the target per second is:

An $X$-ray tube is operated at $50\, kV$. The minimum wavelength produced is ....... $\mathring{A}$.