Question 1:

An ideal battery is connected to an external resistor. When 4.5 0 is added, the current drops from 10 A to 5.6 A. Find the value of the resistor and the emf of the battery. R. emfA car battery has a terminal potential difference of 13.5 V when there is no load. When the starter motor draws 70 A, the terminal potential difference drops to 10.5 V. What is the internal resistance of the battery?A battery has an emf & and an internal resistance r. It is connected to an external resistor R. When R = 3.5 ? the terminal potential difference is 11.453 V. When R = 6.5 0 the terminal potential difference is 11.913 V. Find & and r. n