Q.What percentage of the input energy is radiated by filament lamps?

  • A2 to 5 percent
  • B10 to 15 percent
  • C25 to 30 percent
  • D40 to 50 percent
Correct Answer : (B)

10 to 15 percent

Hints :

10 to 15 percent of the input energy is radiated by filament lamps.

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