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Current Electricity question

2005 · Q130
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Current Electricity question

2005 · Q130

NEETPhysicsCurrent ElectricityMCQ+4 / −1
A 5-ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire is
  1. A
    0.04 ohm
  2. B
    0.2 ohm
  3. C
    5 ohm
  4. D
    0.4 ohm
View written solutionFree

Correct answer: A

P = i2R or 1 = 25 × R

R=125=0.04ΩR = {1 \over {25}} = 0.04\Omega R=251​=0.04Ω

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