Which of the two is more energy efficient : filament type electric bulb or CFL ? Why?
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Explanation:
The filament type - or Tungsten - bulb works on the principle that when current is passed through the filament, it heats up turning into red, yellow and finally the yellowish white - which is the light we get. Now getting light by the process of excessive heating means that most of power is wasted as heat. In the Tungsten bulb, 95% of the energy goes away as heat! You can feel it by your touch within a couple of minutes after switching on the bulb.
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In filament type electric bulb, we get light when the filament heats up and begins to glow. A large amount of electrical energy is lost as heat. So, this kind of bulb is energy efficient or power efficient.
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