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27 July, 15:29

A battery with internal resistance r is connected to a load resistance R. If R is increased, does the terminal voltage of the battery increase, decrease, or stay the same?

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  1. 27 July, 17:52
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    The terminal voltage of the battery decreases.

    Explanation:

    An idea battery does not have internal resistance but a real practical battery always have an internal resistance r connected in series with the battery.

    This internal resistance causes a voltage drop when load R is connected, a current I flows in the circuit which causes a voltage drop I*r in the battery therefore, the terminal voltage of the battery will decrease.
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