Figure shows two conducting thin concentric shells of radii \( \mathrm{r} \) and \( 3 \mathrm{r}...

Figure shows two conducting thin concentric shells of radii \( \mathrm{r} \) and \( 3 \mathrm{r}...

Figure shows two conducting thin concentric shells of radii \( \mathrm{r} \) and \( 3 \mathrm{r} \). The outer shell carries charge \( \mathrm{q} \) and inner shell is neutral. The amount of charge which flows from inner shell to the earth after the key P \( \mathrm{K} \) is closed, is equal to :- W (A) \( -q / 3 \) (B) \( q / 3 \) (C) \( 3 q \) (D) \( -3 q \) 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live