1. The problem statement, all variables and given/known data In a fluorescent tube of diameter 3 cm, 10 *1018 electrons and 2.5 * 1018 positive ions (with a charge of +e) flow through a cross-sectional area each second. What is the current in the tube? 2. Relevant equations Current is I = (delta Q)/(deta T) 3. The attempt at a solution delta t is given as 1 second, but how do u calculate the change in charge given this information?