1. The problem statement, all variables and given/known data The e.m.f of a battery is 12V and provides an electrical energy of 500J. What is the amount of charges flowing in the battery for 5 seconds? 2. The attempt at a solution Since V=W/Q, rearranging the equation gives you Q=W/V: Q= 500/12 = 41.6666667 C But, I don't know what is the 5 seconds for. So, I just put 41.6666667 C as the answer and I got it wrong.