How are $X$-rays produced in the laboratory?

$A$ metal target with atomic number $Z=46$ is bombarded with a high-energy electron beam. The emission of $X$-rays from the target is analyzed. The ratio $r$ of the wavelengths of the $K_\alpha$-line and the cut-off wavelength is found to be $r=2$. If the same electron beam bombards another metal target with $Z=41$,the value of $r$ will be

Atomic number of anticathode material in an $X$-ray tube is $41$. Wavelength of $K_\alpha$ $X$-ray produced in the tube is ........ $\mathring A$.

The power input in an $X$-ray tube is increased by:

$X-$rays are known to be electromagnetic radiations. Therefore,the $X-$ray photon has

The $X-$ray beam coming from an $X-$ray tube will be: