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# Experiment 12 - Discharging Battery

 In the experiments, you measure two values... The voltage U0 of the battery without a load circuit and the current I through the load circuit. From this you can calculate the internal resistance Ri... Ri = ( U0 / I ) - RL (Where does this formula come from...?...see Experiment 18 in the section "Know more...") At the charged battery you measure a voltage U0 of 9 V. In a second step you measure a current through the load circuit of I = 0.8 A. Hence you calculate the internal resistor Ri = 1.2 Ω. Measuring the voltage U0 of the battery without a load circuit. Measurement of the current I in a load circuit. Circuit for measuring the voltage U0 of the battery without a load circuit. (Enlarge) Circuit for measuring the current I in a load circuit. (Enlarge)

In the next step you start to discharge the battery... Experiment 13 - Discharging Battery II

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