MCQ
Some laws/processes are given in Column $I$. Match these with the physical phenomena given in Column $II$ and indicate your answer by darkening appropriate bubbles in the $4 \times 4$ matrix given in the $ORS$.
| Column $I$ | Column $II$ |
| $(A)$ Transition between two atomic energy levels | $(p)$ Characteristic $X$-rays |
| $(B)$ Electron emission from a material | $(q)$ Photoelectric effect |
| $(C)$ Mosley's law | $(r)$ Hydrogen spectrum |
| $(D)$ Change of photon energy into kinetic energy of electrons | $(s)$ $\beta$-decay |
- A$A \rightarrow(q) \&(s), B \rightarrow(q) \&(~p), C \rightarrow(p), D \rightarrow(s)$
- ✓$A \rightarrow(p) \&(r), B \rightarrow(q) \&(~s), C \rightarrow(p), D \rightarrow(q)$
- C$A \rightarrow(s) \&(r), B \rightarrow(p) \&(~s), C \rightarrow(p), D \rightarrow(s)$
- D$A \rightarrow(p) \&(q), B \rightarrow(q) \&(~r), C \rightarrow(p), D \rightarrow(q)$