A block of mass m having a charge q is placed on a smooth horizontal table and is connected to a wall through an unstressed spring of spring constant k as shown in figure. A horizontal electric field E parallel to the spring is switched on. Find the amplitude of the resulting SHM of the block.
![1720362_d1c9c855b2454b10b0f823464b30fa7a.png](https://search-static.byjusweb.com/question-images/toppr_invalid/questions/1720362_d1c9c855b2454b10b0f823464b30fa7a.png)