Question
Download Solution PDFA fuse wire of a circular cross-section of radius 1.6 mm blows off at 16 A. At what current will it blow off if the radius is reduced to 0.4 mm?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Fusing current is proportional to the 3/2 power of the wire’s radius:
\( \frac{I_1}{I_2} = \left( \frac{r_1}{r_2} \right)^{3/2} \)
Substituting: \( \frac{16}{I_2} = (4)^{3/2} = 8 \Rightarrow I_2 = 2\ \text{A} \)
Last updated on May 29, 2025
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