Two fuse wires of the same length are rated 5A and 20A. Which of the f

1.	Two fuse wires of the same length are rated 5A and 20A. Which of the fuse wires is thicker and why?
Answer» R ∝ 1/πr² R∝1/I ∴ I∝ πr² i.e. more radius, more current. so 20A wire will be thicker, as it carries large current.

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

Answer»

R ∝ 1/πr²

R∝1/I

∴ I∝ πr² i.e. more radius, more current.

so 20A wire will be thicker, as it carries large current.