Xam idea - Science

Book: Xam idea - Science

Chapter: 13. Magnetic Effects of Electric Current

Subject: Physics - Class 10th

Q. No. 14 of Proficiency Exercise

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Two fuse wires of same length are rated 5 A and 20 A. Which of the two fuse wires is thicker and why?

The wire of 20 A is thicker than that of 5 A. We know that the resistance of a wire is inversely proportional to the area of cross-section of the wire. Thus, the wire having higher current through it should have lesser resistance.


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