Question

explain why filament type electric bulbs are not power efficient. name any two type of electric lighting devices which are much more energy efficient than filament type bulb​

Answer 1

Answer:

Filament type electric bulbs are not power efficien because most of the electric power consumed by the filament of a bulb appears as heat and only a small amount of electric power is converted into light.

Answer 2

Explanation:

Filaments of electric bulb are made up of tungsten, the melting point of tungsten is very high around 3000 °c.

as a result of which it consumes a lot of energy, so it is not power efficient.

Two lightning device's which are much more efficient thsn filament type bulb are

1- Led bulbs

2- CFL

Hope it helps.