Q. 144.6( 8 Votes )
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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