Home PYQs UPPSC UPPSC MCQs Prelims 2009 (GS Paper I)

Question

A fluorescent tube is preferred to an electric bulb because:

  1. It has a larger light emitting surface
  2. Voltage fluctuations do not affect it
  3. In a tube electrical energy is almost full converted into light.
  4. None of the above

Answer:

Option C: In a tube electrical energy is almost full converted into light.

Detailed Solution:

The correct answer is “In a tube electrical energy is almost full converted into light.”.

A fluorescent tube is preferred to an electric bulb because almost all of the electrical energy in a tube is converted into light. This makes fluorescent tubes more energy efficient than electric bulbs.