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2 May, 09:38

If I varies inversely with R and I = 0.25 when R = 18, which equation should be used to show this relationship?

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  1. 2 May, 09:52
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    Inverse relationships are of the form xy=k or if you prefer y=k/x so to find the constant we can say:

    18 (0.25) = k=4.5

    So you could say: IR=4.5 or I=4.5/R
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