As the electric current in a lightbulb is slowly increased, the filament glows more and more brightly. Why does this happen?

Question

asked Dec 10, 2018 43.1k views

1 Answer

Stackoverblown · Answer 1 · 2018-12-15T08:35:19+0000

It happens due to the inner resistance. Resistance causes heating of tungsten filament and with more resistance, a light bulb produces more light.