The cube in the figure below contains negative charge, in which E1 = 13 N/C and E2 = 22 N/C. The electric field is constant over each face of the cube. Does the missing electric field vector on the front face point in or out?
What is the minimum possible field strenght?
![925_field.png](https://secure.tutorsglobe.com/CMSImages/925_field.png)