Multiple choice

Consider the following statements:

  1. CFLs are recommended to use because they convert DC to AC.
  2. CFL contains mercury, which is very toxic to health and environment.
  3. LEDs use the least power (watts) per unit of light generated (lumens).

Which of the given statements is/are correct?

  1. Only (1)

  2. Only (2)

  3. Only (3)

  4. Only (2) and (3)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(i) Statement (1) is wrong. CFLs are recommended to use for their energy efficiency. Rectifiers are used to convert DC to AC. (ii) Statement (2) is correct. CFL lamps contain mercury, which is very toxic to health and environment. (iii) Statement (3) is correct. LEDs use the least power (watts) per unit of light generated (lumens).

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