1. The problem statement, all variables and given/known data does a flashlight battery have an internal resistance? explain. this problem is for my lab, and we are farther ahead in lab than in lecture. so i haven't actually learned this material yet. 2. Relevant equations i'm not really sure. R=∆V/I also, -VB + VR + VM + VInt = 0 but i don't think that's relevant here at all. it's more of a conceptual question i assume. 3. The attempt at a solution well... as i said, we haven't actually learned this material. all i know is that our TAs told us that our battery in the lab had an internal resistance affecting its voltage. i don't really understand what being a flashlight would have to do with the workings of the battery. if anyone could help me to understand how i should go about finding my answer, that'd be wonderful. thank you!