Physics
Grade-9
Easy
Question
What is the efficiency of a halogen bulb?
- Less than 10 %
- More than 15%
- Between 10% and 15%
- Cannot say
Hint:
- The luminous efficiency of halogen lamps cradles between the previous two at an approximate 3.5 percent efficiency.
The correct answer is: Between 10% and 15%
- energy input = useful energy output + waste energy
- Efficiency (%) = (useful energy output ÷ energy input) × 100
- The luminous efficiency of halogen lamps cradles between the previous two at an approximate 3.5 percent efficiency.
- So it Less than 10 %
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