There's a problem in my textbook where it gives the emf of a battery, its internal resistance, and the net resistance of the circuit that it is connected to. Then it asks for the terminal voltage. Actually, this is just a problem set (not exactly a textbook), so it doesn't teach me from previous examples. I'm still fumbling my way around these problems... Could someone please give me a hint on what to do? So far, from what I've read on the internet, you can calculate the terminal voltage as: V = emf - ir I have the emf, and the internal resistance...but no current is given. Haha, I'm so confused.