A 5 ampere fuse wire can withstand a maximum power of 1 watt in its circuit. The resistance of the fuse wire is:
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Question

A 5 ampere fuse wire can withstand a maximum power of 1 watt in its circuit. The resistance of the fuse wire is:

G1 Physics · Accepted Answer

Step 1: For a fuse P = I²R. Step 2: R = P/I² = 1/(5²) = 1/25 Ω = 0.04 Ω.