The current rating of a fuse wire and its radius are related as (1)...

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The current rating of a fuse wire and its radius are related as
(1) \( I \propto r^{2} \)
(2) \( I \propto r^{3} \)
(3) \( I \propto \sqrt{r} \)
(4) \( I \propto r^{\frac{1}{2}} \)
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