Multiple choice

Which of the following devices can be used to reduce the maximum wastage of electricity and still glow bright?

  1. Compact fluorescent lamp

  2. A blue coloured bulb

  3. Halogen lamp

  4. LED bulb

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is correct. LED gives more light, but does not produce heat. Hence, wastage of electricty is nill or very little.