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What is the difference between a CFL and an LED lamp? 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses…

IAS 2011Science Technology

2011mcqmedium
What is the difference between a CFL and an LED lamp?
  1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.
  2. The average life span of a CFL is much longer than that of an LED lamp.
  3. A CFL is less energy-efficient as compared to an LED lamp.
Which of the statements given above is/are correct?
Official previous-year question

Prelims GS Paper I · Held on 12 Jun 2011.

Options

  1. A1 only
  2. B2 and 3 only
  3. C1 and 3 only
  4. D1, 2 and 3

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