Q. A 5-A fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is :
A) 0.02 Ω
B) 0.2 Ω
C) 0.4 Ω
D) 0.04 Ω
Explanation
[Solution from source] P = I²R, so R = P/I² = 1/25 = 0.04 Ω. Using P = IR gives 0.2 Ω. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.