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A lamp is rated 240V, 60W. The resistance of the filament is

Physics
JAMB 1990
A lamp is rated 240V, 60W. The resistance of the filament is
  • A. 960\(\Omega\)
  • B. 16\(\Omega\)
  • C. 15\(\Omega\)
  • D. 4\(\Omega\)
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Correct Answer: Option A
Explanation
P = \(\frac{V_2}{R}\) \(\Rightarrow\) R = \(\frac{V_2}{p}\)

= \(\frac{240\times 240}{60}\)

= 960\(\Omega\)
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