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    A high resistance voltmeter records the potential difference across a battery which is connected to a variable resistor of resistance R,

    The reading on the voltmeter, V, takes the following values: V=V𝟢 when R=R𝟢 and V=V𝟣 when R=R𝟣,

    calculate the internal resistance r
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    V = I(r + R)
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    how do you use this to get r though?
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    That's as close as i think you can get to a value
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    thank you so much!
 
 
 
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