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An electric bulb is rated 60W, 220V. Calculate the resistance of its filament when it...

Physics
WAEC 2001

An electric bulb is rated 60W, 220V. Calculate the resistance of its filament when it is operating normally

  • A. 296.7\(\Omega\)
  • B. 400.0\(\Omega\)
  • C. 512.2\(\Omega\)
  • D. 806.7\(\Omega\)
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Correct Answer: Option D
Explanation

R = \(\frac{v^2}{P} = \frac{220^2}{100} = 806.7\Omega\)

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