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    Internal Resistance of a Battery

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    The circuit is used to measure the internal impedance of a battery.
    The battery being tested as a NiMH battery cell.
    A fresh battery is being tested, and it is found that the voltage Vout,
    is 2.28 V with the switch open and 2.27 V with the switch closed.
    Find the internal resistance of the battery.

    See attached file for full problem description.

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    Solution Preview

    When the switch is open there is no current flowing and Vb = Vout (no voltage ...

    Solution Summary

    This solution calculates the internal resistance of a battery.