Question

you might have noticed that a glowing electric bulb become warm do you know why

Answer 1

It is a property of Electricity that is produces heat....due to dis property....the bulb gets heated wen electricity passes through the filament as it glows. Actually the filament glows because the filament become red hot due to above property. So..dis heat gets transferred to the glass N it feels hot

Answer 2

the electric which is passed through the wire into bulb c is converted into Light energy as it passes through the filament of bulb which is made up if tungsten which has a high melting point but with bulb also contain gasses which somehow heated up and cause 19th bulb a little bit earned up