Dual Nature, Atoms & Nuclei · JEE Advanced previous year questions

2024 1 question

1. Q202024 · 26 May 2024 · Paper 2

   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 is found to be $r=2$. If the same electron beam bombards another metal target with $Z=41$, the value of $r$ will be

   1. A.2.53
   2. B.1.27
   3. C.2.24
   4. D.1.58
   Show answer

   Answer: A