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Two lamps are rated 40W and 220V each are connected in series. The total power...

Physics
JAMB 1978

Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is

  • A. 10W
  • B. 20W
  • C. 40W
  • D. 80W
  • E. None of the above
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Correct Answer: Option D
Explanation

The total power dissipated by both lamps = 40W + 40W = 80W

Since they are connected in series, the total power dissipated will be equal to the sum of the power dissipated in each lamp.

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