1. The problem statement, all variables and given/known data A rubber balloon has a charge q evenly distributed over its surface. It is put into a uniform electric field of 120 N/C. What is the charge inside the balloon? 2. Relevant equations 3. The attempt at a solution I thought that E inside would be 120 since before it is put into the electric field, E inside is 0(true or not?). When it is put into the field you use the principle of superposition and they add to 120 N/C? Any insight to this would be helpful. I handed it in this morning but I'd still like to know if I made correct assumptions.