An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery?
800 Ω
900 Ω
400 Ω
600 Ω
2 answers
See 12:35 PM post.
Henry, that doesn't help the time travelers from the future....
2 answers