Current Electricity - Result Question 72

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

[2005]

(a) 0.04ohm

(b) 0.2ohm

(c) 5ohm

(d) 0.4ohm

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Answer:

Correct Answer: 77. (a)

Solution:

  1. (a) R=PI2=125=0.04Ω


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