A thin metallic spherical shell of radius R carries a charge Q on its surface. A point charge Q/2 is placed at its centre C and an other charge +2 outside the shell at a distance x from the centre as shown in the figure. Find the force on the charge at the centre of shell and at the point A.
![1528802_52f278e74a7e479fb9b550c8b076ae4e.png](https://search-static.byjusweb.com/question-images/toppr_invalid/questions/1528802_52f278e74a7e479fb9b550c8b076ae4e.png)