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Current Electricity question

2005 · Shift 0 · Q123
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Current Electricity question

2005 · Shift 0 · Q123

JEE MainPhysicsCurrent ElectricityMCQ+4 / −1
The resistance of hot tungsten filament is about 101010 times the cold resistance. What will be resistance of 100W100W100W and 200V200V200V lamp when not in use ?
  1. A
    20Ω20\Omega20Ω
  2. B
    40Ω40\Omega40Ω
  3. C
    200Ω200\Omega200Ω
  4. D
    400Ω400\Omega400Ω
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