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The resistance of a bulb filament is 100 at a temperature of 100^ C . If its temperature coefficient of resistance be 0.005 per ^ C , its resistance will become 200 at a temperature of

Options

  1. A200^ C
  2. B300^ C
  3. C400^ C
  4. D500^ C

Correct answer

B. 300^ C

Step-by-step solution

200=100[1+(0.005 t)]T-100=200 T =300^ C

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