When a car's starter is in use, it draws a large current. The car'slights draw much less current. As a certain car is starting, thecurrent through the battery is 61.8 A and the potential difference across the battery terminals is8.91 V. When only the car's lights areused, the current through the battery is 1.84 A and the terminal potential difference is13.0 V.
Find the battery's emf.?
Find the internal resistance.